Mainstream media play a crucial role in constructing the cultural memory of a city.This study used 319 short videos released by“Hi Chengdu,”a new media product of Chengdu Radio and Television,as samples.Based on the...Mainstream media play a crucial role in constructing the cultural memory of a city.This study used 319 short videos released by“Hi Chengdu,”a new media product of Chengdu Radio and Television,as samples.Based on the grounded theory,a research framework encompassing“content,technology,and discourse”was established to explore the paths through which mainstream media construct the cultural memory.Regarding content,this paper emphasized temporal and spatial contexts and urban spaces,delving deep into the themes of the cultural memory and vehicles for it.In terms of technology,this paper discussed the practice of leveraging audio/visual-mode discourse to stitch together the impressions of a city and evoke emotional resonance to create a“flow”of memory.As for discourse,this paper looked at the performance of a communication ritual to frame concepts and shape urban identity.It is essential to break free from conventional thinking and leverage local culture as the primary driving force to further boost a city’s productivity,in order to excel in cultural communication.展开更多
Taking the National Experimental Teaching Demonstration Center of the Central Academy of Drama as an example,this article explores the construction and development of the National Experimental Teaching Demonstration C...Taking the National Experimental Teaching Demonstration Center of the Central Academy of Drama as an example,this article explores the construction and development of the National Experimental Teaching Demonstration Center for the practical teaching of drama and film and television disciplines.The article first introduces the background and importance of the demonstration center and then analyzes in depth the construction content and achievements of the demonstration center from four aspects:practical teaching philosophy,practical teaching system,practical teaching resources,and practical teaching effects.Finally,the article summarizes the experience and shortcomings of the demonstration center and proposes future development directions and suggestions.展开更多
In order to improve the performance and reliability of the radio and televisio transmission system and prowide users with a better audiovisual experience,this paper first analyzes the advantages of microwave in radio ...In order to improve the performance and reliability of the radio and televisio transmission system and prowide users with a better audiovisual experience,this paper first analyzes the advantages of microwave in radio and television transmitters,and further elaborates the radio and television transmission system.Through the reasonable configuration and appication of microwave equipment,the performance and reliability of radio and television transmission system can be improved,and the stable transmission of radio and television signals can be ensured.展开更多
A television based multistatic radar system is described. The commercial television transmitter is used as the illuminator in the multistatic radar system. The reflected commercial television signals are measured by ...A television based multistatic radar system is described. The commercial television transmitter is used as the illuminator in the multistatic radar system. The reflected commercial television signals are measured by an array of sensors. A data processing scheme is developed that adapts to the poor signal processing ability. The innovation is focused on the construction of the observation space, which could reduce the non linearity error. The new method leads to better system stability than the traditional one. Monte Carlo simulation is utilized and compared with the traditional method.展开更多
Objective To test the effect of television viewing on pediatric obesity in urban China. Methods Stratified multistage cluster random sampling method was used for subjects selection. Nine thousand three hundred and fif...Objective To test the effect of television viewing on pediatric obesity in urban China. Methods Stratified multistage cluster random sampling method was used for subjects selection. Nine thousand three hundred and fifty-six children, as well as their parents, were investigated. Questionnaire survey was used for data collection. Children's weights and heights were measured in the clinic of the investigated kindergartens or schools by trained investigators following the standardized procedure. Results The percentages of children and adolescents who watched television less than 1 h, 1-2 h, 2-3 h and more than 3 h daily were 32.5%, 46.0%, 15.4% and 6.1%, respectively, while the prevalence of obesity was 10.9%, 11.8%, 13.2% and 15.1%, respectively. Each hourly increment of television viewing was associated with 1 %-2% increase in the prevalence of obesity. Conclusions Time spent watching television is directly related to an increase risk of obesity, television viewing time is an independent factor for pediatric obesity.展开更多
Objective The purpose of this study was to explore how obesity was covered in television news in China, including the trends over time and the characteristics of obesity-related news. Methods The frame analysis was ad...Objective The purpose of this study was to explore how obesity was covered in television news in China, including the trends over time and the characteristics of obesity-related news. Methods The frame analysis was adopted to assess the content of obesity-related news broadcasted in China Central Television (CCTV) from 1982 to 2009. To investigate the characteristics of the news, the obesity-related news was divided into subgroups according to populations concerned, as well as the period in which the news was broadcasted. The differences between subgroups were examined. Results A total of 1 599 pieces of news reported obesity, in which 1 278 pieces (79.92%) aired in "wealthy" period (2006-2009). More news was concerned with adults (1 134, 70.92%). "Individual behavior" dominated most of the cause frames (389, 24.33%), solution frames (522, 32.65%), and responsibility frames (860, 53.78%). There was more news mentioning individual factors in news aired in "wealthy" period and news concerning children. The coverage of social-structure causes was higher in news concerning children, while the coverage of social-structure solutions was higher in news concerning children and news aired in "wealthy" period. Conclusion Although the coverage of obesity was modest, it showed an incremental trend as the economy grew. Obesity was mostly depicted as an individual problem in terms of responsibility, causes and solutions.展开更多
In this paper, I described the methods that I used for the creation of Xlets, which are Java applets that are developed for the IDTV environment;and the methods for online data retrieval and processing that I utilized...In this paper, I described the methods that I used for the creation of Xlets, which are Java applets that are developed for the IDTV environment;and the methods for online data retrieval and processing that I utilized in these Xlets. The themes that I chose for the Xlets of the IDTV applications are Earthquake and Tsunami Early Warning;Recent Seismic Activity Report;and Emergency Services. The online data regarding the Recent Seismic Activity Report application are provided by the Kandilli Observatory and Earthquake Research Institute (KOERI) of Bogazici University in Istanbul;while the online data for the Earthquake and Tsunami Early Warning and the Emergency Services applications are provided by the Godoro website which I used for storing (and retrieving by the Xlets) the earthquake and tsunami early warning simulation data, and the DVB network subscriber data (such as name and address information) for utilizing in the Emergency Services (Police, Ambulance and Fire Department) application. I have focused on the methodologies to use digital television as an efficient medium to convey timely and useful information regarding seismic warning data to the public, which forms the main research topic of this paper.展开更多
With the development of the economy,film and television education has gradually received more and more attention.With the rapid development of new media technologies,there are still some problems in film and televisio...With the development of the economy,film and television education has gradually received more and more attention.With the rapid development of new media technologies,there are still some problems in film and television education in the new media environment.This paper mainly analyzes the problems faced by film and television education in the new media environment,and the development direction of film and television education in the new media era,and explores the forms of film and television education and film industry integration.展开更多
This is to review and analyse the chapters of one of John Hartley's works Uses of Television, and compare it with different readers related to the studies of TV. It mainly discusses teaching television in four par...This is to review and analyse the chapters of one of John Hartley's works Uses of Television, and compare it with different readers related to the studies of TV. It mainly discusses teaching television in four parts: the effect of the audience on television, textual tradition and television, television and citizenship, and television as transmodern teaching.展开更多
A new dual-mode transmission networks (DMTN) based on broad-storage architecture for digital television (DTV) is proposed, in which the primary TV network is superimposed by a complementary framework based on broa...A new dual-mode transmission networks (DMTN) based on broad-storage architecture for digital television (DTV) is proposed, in which the primary TV network is superimposed by a complementary framework based on broad-storage TV (BSTV). The necessity of congregating hot TV resources is discussed via analyzing the scale-free properties in DMTN. The self-organized parallel broadcasting technology (SPBT) and the uniform content locator (UCL) are studied to utilize availably transmission channels and to help consumers to communicate with each other expediently. Experimental results show that DMTN can provide not only traditional TV services on schedule, but also digital interactive TV services on demand by using a single channel.展开更多
Childhood overweight and obesity, is an emerging public health concern in developing countries like Bangladesh. However, regular television watching by child’s mother and its impact on excess weight gain or overweigh...Childhood overweight and obesity, is an emerging public health concern in developing countries like Bangladesh. However, regular television watching by child’s mother and its impact on excess weight gain or overweight and obesity to their offspring is not reported elsewhere. The aim of the present analysis was to determine the socio-demographic characteristics among overweight and obese children based on those mothers who watch television regularly and compare this finding with malnourished and well-nourished under-5 children. A total of 20,800 under-5 children were enrolled during 1996 to 2012 in the Diarrheal Disease Surveillance System (DDSS) of Dhaka Hospital of International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b). Mean weight-for-age z-score (–1.61 vs. –2.30;mean difference: ?0.69;p < 0.001), height-for-age z-score (–1.42 vs. –1.99;–0.57;<0.001), weight-for-height z-score (–1.59 vs. –1.07;–0.53;<0.001), BMI-for-age z-score (–1.09 vs. –1.61, –0.52;<0.001) differed significantly between the children whose mother did and did not watch television regularly. Under-5 children whose mother watched television regularly (2%) compared to those who did not (1%), had 2.28 [(95% CI-1.61 - 3.24) p < 0.001] times increased odds of being overweight and obese. Television watching of mothers is associated with childhood overweight and obesity and is one of the most public health concerns in Bangladesh. These changes may be in part of better socio-economic condition, changes in life style behaviour and dietary pattern.展开更多
Proceeding from the specific characteristics of PAL television signals adopted in China this paper points out that if the fs = 2fsc of sub-Nyquist sampling and DPCM encoding is used for PAL complete signal and if the ...Proceeding from the specific characteristics of PAL television signals adopted in China this paper points out that if the fs = 2fsc of sub-Nyquist sampling and DPCM encoding is used for PAL complete signal and if the blanking time is utilized to transmit code of effective area, it is possible to transmit a color TV signal over PCM three-group channel.展开更多
The DVB-T (Digital Video Broadcasting—Terrestrial) standard is being deployed in many parts of the world for digital broadcasting services, providing a variety of features extending the capabilities of the older anal...The DVB-T (Digital Video Broadcasting—Terrestrial) standard is being deployed in many parts of the world for digital broadcasting services, providing a variety of features extending the capabilities of the older analog ones. In this paper, a two-stage low noise amplifier (LNA) is designed for use with the DVB-T standard. The design is employed based on microstrip. The microwave design meets all the specifications required, achieving input and output return loss below ?10 dB, high gain of 35 dB and high linearity. Low noise figure of 1.3 dB is achieved with the use of pHEMT transistor technology.展开更多
The development course of China's meteorological movie and television was analyzed firstly, and then the improvement strategies of meteorological movie and television services facing public needs were put forward bas...The development course of China's meteorological movie and television was analyzed firstly, and then the improvement strategies of meteorological movie and television services facing public needs were put forward based on the statistical results of a meteorological service questionnaire.展开更多
A new architecture for digital television (DTV) delivery based on Ethernet was presented. In this architecture, new protocol stack and packet encapsulation were proposed to help implementation of DTV services over Eth...A new architecture for digital television (DTV) delivery based on Ethernet was presented. In this architecture, new protocol stack and packet encapsulation were proposed to help implementation of DTV services over Ethernet link. A simple quality of service (QoS) structure was provided in traffic control of nodes to achieve QoS requirements of DTV delivery. Experiments were proceeded successfully to implement the idea. Finally, a short evaluation to QoS provisions was given, achieving good results.展开更多
Dissemination of information to citizens is a relevant component of governance. Expectedly, viewers tuned to broadcast stations within and outside their localities, expecting their receivers to faithfully reproduce th...Dissemination of information to citizens is a relevant component of governance. Expectedly, viewers tuned to broadcast stations within and outside their localities, expecting their receivers to faithfully reproduce the exact features of the transmitted signal. Akpabuyo is a dense forest zone near the creeks leading to the Atlantic ocean in Cross River State, Nigeria. The location has distinct environmental characteristics that made Akpabuyo Area Council, a challenging location to propagate electromagnetic waves;and therefore recipe for further investigation. Radio frequency analyzer, with 24 channels spectrum, ranging between 46 - 870 MHz (model: RO.VE.R.-“DLM3-T”) was deployed to capture signals from terrestrial television stations (TV). CATV measured signal of TV stations in dB, dBμV and dBmV. Its frequency ranged from 40 - 860 MHz;while varying from channel 1 to channel 69. Measurements taken from Akpabuyo L.G.A. showed the following results: the signal strength received from VHF Channel 11 ranged from 20 dBμV to 49 dBμV. From recorded empirical statistics from the study, 50% of the area received signal from this station above 30 dBμV, while other regions had signals below this value;representing the fringe zone of the frequency. The results obtained from the study relatively showed acceptance with Egli’s model. The study recorded a steady fluctuation between 17 dBμV and 19 dBμV from both propagating stations. However, Channel 27 signal at 519 MHz, had very weak signal coverage in Akpabuyo Local Government Area;with signal strength dropped to as low as 13 dB in many parts of the rural area. The study discovered that the state’s broadcasting stations, both at UHF and VHF channels did not transmit successfully across this densely forest (rural) location. Remedial measures such as installing Repeater stations at different locations as signal booster were recommended.展开更多
The invention and development of television art is closely connected with scientific research. The historic facts have witnessed the influence of scientific research progress on the development of television art. In t...The invention and development of television art is closely connected with scientific research. The historic facts have witnessed the influence of scientific research progress on the development of television art. In this paper, the author intends to reveal some phenomenal facts which are known by very few people, namely, the first ever appearance of electronic television in Uzbekistan. This paper gives us some authentic and valuable historic materials for the invention and development of television set in the world.展开更多
This paper introduces a method to realize digital television transmission based on asynchronous transfer mode (ATM), a technology based on fast packet switching. Choosing the integral multiple length of an ATM cell pa...This paper introduces a method to realize digital television transmission based on asynchronous transfer mode (ATM), a technology based on fast packet switching. Choosing the integral multiple length of an ATM cell payload to equal to the length of an MPEG transport stream packet, an MPEG transport stream packet can be inextenso loaded by several ATM cells and trans-formed into ATM cells. Using ATM virtual connection technology and B-ISDN, the interoperability between ATM and DTV may be realized, and DTV signal transmission may also be realized finally.展开更多
This study investigates the current situation of the film and television education in primary and secondary schools in China. The purpose is to find out the problems existing in the current film and television educati...This study investigates the current situation of the film and television education in primary and secondary schools in China. The purpose is to find out the problems existing in the current film and television education in primary and secondary schools, and give improvement measures. A questionnaire was designed in this study and teachers in 89 primary and secondary schools in Liaocheng City, Shandong Province filled in the questionnaires. A total of 355 valid questionnaires were collected. This study analyzed the survey data, and drawn a series of conclusions about the current situation of film and television education in primary and secondary schools on the basis of data analysis. Based on the results of the survey, some suggestions are given to provide reference for the development of film and television education in primary and secondary schools.展开更多
A modular flat-screen liquid crystal television display is described.The picture elements of the modules may be emissive,reflective or transmissive.The flat-screen liquid crystal television also comprised of an electr...A modular flat-screen liquid crystal television display is described.The picture elements of the modules may be emissive,reflective or transmissive.The flat-screen liquid crystal television also comprised of an electrical control circuit capable of categorizing incoming television picture signals corresponding to the modules in the array and directing the electrical signals to the drive circuits of each module according to the portion of the television picture to be reproduced by the picture elements of that module.The picture elements are preferably formed in a light modulating film composed of a liquid crystal dispersion in a polymeric binder.A color display was also produced by placing a patterned red-green-blue filter adjacent the active matrix so that each picture element could also be coordinated with the color components of a color video signal.展开更多
文摘Mainstream media play a crucial role in constructing the cultural memory of a city.This study used 319 short videos released by“Hi Chengdu,”a new media product of Chengdu Radio and Television,as samples.Based on the grounded theory,a research framework encompassing“content,technology,and discourse”was established to explore the paths through which mainstream media construct the cultural memory.Regarding content,this paper emphasized temporal and spatial contexts and urban spaces,delving deep into the themes of the cultural memory and vehicles for it.In terms of technology,this paper discussed the practice of leveraging audio/visual-mode discourse to stitch together the impressions of a city and evoke emotional resonance to create a“flow”of memory.As for discourse,this paper looked at the performance of a communication ritual to frame concepts and shape urban identity.It is essential to break free from conventional thinking and leverage local culture as the primary driving force to further boost a city’s productivity,in order to excel in cultural communication.
文摘Taking the National Experimental Teaching Demonstration Center of the Central Academy of Drama as an example,this article explores the construction and development of the National Experimental Teaching Demonstration Center for the practical teaching of drama and film and television disciplines.The article first introduces the background and importance of the demonstration center and then analyzes in depth the construction content and achievements of the demonstration center from four aspects:practical teaching philosophy,practical teaching system,practical teaching resources,and practical teaching effects.Finally,the article summarizes the experience and shortcomings of the demonstration center and proposes future development directions and suggestions.
文摘In order to improve the performance and reliability of the radio and televisio transmission system and prowide users with a better audiovisual experience,this paper first analyzes the advantages of microwave in radio and television transmitters,and further elaborates the radio and television transmission system.Through the reasonable configuration and appication of microwave equipment,the performance and reliability of radio and television transmission system can be improved,and the stable transmission of radio and television signals can be ensured.
文摘A television based multistatic radar system is described. The commercial television transmitter is used as the illuminator in the multistatic radar system. The reflected commercial television signals are measured by an array of sensors. A data processing scheme is developed that adapts to the poor signal processing ability. The innovation is focused on the construction of the observation space, which could reduce the non linearity error. The new method leads to better system stability than the traditional one. Monte Carlo simulation is utilized and compared with the traditional method.
基金This research was funded by "Danone Institute China Diet Nutrition Research & Communication Grant".
文摘Objective To test the effect of television viewing on pediatric obesity in urban China. Methods Stratified multistage cluster random sampling method was used for subjects selection. Nine thousand three hundred and fifty-six children, as well as their parents, were investigated. Questionnaire survey was used for data collection. Children's weights and heights were measured in the clinic of the investigated kindergartens or schools by trained investigators following the standardized procedure. Results The percentages of children and adolescents who watched television less than 1 h, 1-2 h, 2-3 h and more than 3 h daily were 32.5%, 46.0%, 15.4% and 6.1%, respectively, while the prevalence of obesity was 10.9%, 11.8%, 13.2% and 15.1%, respectively. Each hourly increment of television viewing was associated with 1 %-2% increase in the prevalence of obesity. Conclusions Time spent watching television is directly related to an increase risk of obesity, television viewing time is an independent factor for pediatric obesity.
文摘Objective The purpose of this study was to explore how obesity was covered in television news in China, including the trends over time and the characteristics of obesity-related news. Methods The frame analysis was adopted to assess the content of obesity-related news broadcasted in China Central Television (CCTV) from 1982 to 2009. To investigate the characteristics of the news, the obesity-related news was divided into subgroups according to populations concerned, as well as the period in which the news was broadcasted. The differences between subgroups were examined. Results A total of 1 599 pieces of news reported obesity, in which 1 278 pieces (79.92%) aired in "wealthy" period (2006-2009). More news was concerned with adults (1 134, 70.92%). "Individual behavior" dominated most of the cause frames (389, 24.33%), solution frames (522, 32.65%), and responsibility frames (860, 53.78%). There was more news mentioning individual factors in news aired in "wealthy" period and news concerning children. The coverage of social-structure causes was higher in news concerning children, while the coverage of social-structure solutions was higher in news concerning children and news aired in "wealthy" period. Conclusion Although the coverage of obesity was modest, it showed an incremental trend as the economy grew. Obesity was mostly depicted as an individual problem in terms of responsibility, causes and solutions.
文摘In this paper, I described the methods that I used for the creation of Xlets, which are Java applets that are developed for the IDTV environment;and the methods for online data retrieval and processing that I utilized in these Xlets. The themes that I chose for the Xlets of the IDTV applications are Earthquake and Tsunami Early Warning;Recent Seismic Activity Report;and Emergency Services. The online data regarding the Recent Seismic Activity Report application are provided by the Kandilli Observatory and Earthquake Research Institute (KOERI) of Bogazici University in Istanbul;while the online data for the Earthquake and Tsunami Early Warning and the Emergency Services applications are provided by the Godoro website which I used for storing (and retrieving by the Xlets) the earthquake and tsunami early warning simulation data, and the DVB network subscriber data (such as name and address information) for utilizing in the Emergency Services (Police, Ambulance and Fire Department) application. I have focused on the methodologies to use digital television as an efficient medium to convey timely and useful information regarding seismic warning data to the public, which forms the main research topic of this paper.
文摘With the development of the economy,film and television education has gradually received more and more attention.With the rapid development of new media technologies,there are still some problems in film and television education in the new media environment.This paper mainly analyzes the problems faced by film and television education in the new media environment,and the development direction of film and television education in the new media era,and explores the forms of film and television education and film industry integration.
文摘This is to review and analyse the chapters of one of John Hartley's works Uses of Television, and compare it with different readers related to the studies of TV. It mainly discusses teaching television in four parts: the effect of the audience on television, textual tradition and television, television and citizenship, and television as transmodern teaching.
基金Sponsored by the National High Technology Research and Development Program of China(2007AA01Z151)the National Natural Science Foundation of China(60272014)
文摘A new dual-mode transmission networks (DMTN) based on broad-storage architecture for digital television (DTV) is proposed, in which the primary TV network is superimposed by a complementary framework based on broad-storage TV (BSTV). The necessity of congregating hot TV resources is discussed via analyzing the scale-free properties in DMTN. The self-organized parallel broadcasting technology (SPBT) and the uniform content locator (UCL) are studied to utilize availably transmission channels and to help consumers to communicate with each other expediently. Experimental results show that DMTN can provide not only traditional TV services on schedule, but also digital interactive TV services on demand by using a single channel.
文摘Childhood overweight and obesity, is an emerging public health concern in developing countries like Bangladesh. However, regular television watching by child’s mother and its impact on excess weight gain or overweight and obesity to their offspring is not reported elsewhere. The aim of the present analysis was to determine the socio-demographic characteristics among overweight and obese children based on those mothers who watch television regularly and compare this finding with malnourished and well-nourished under-5 children. A total of 20,800 under-5 children were enrolled during 1996 to 2012 in the Diarrheal Disease Surveillance System (DDSS) of Dhaka Hospital of International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b). Mean weight-for-age z-score (–1.61 vs. –2.30;mean difference: ?0.69;p < 0.001), height-for-age z-score (–1.42 vs. –1.99;–0.57;<0.001), weight-for-height z-score (–1.59 vs. –1.07;–0.53;<0.001), BMI-for-age z-score (–1.09 vs. –1.61, –0.52;<0.001) differed significantly between the children whose mother did and did not watch television regularly. Under-5 children whose mother watched television regularly (2%) compared to those who did not (1%), had 2.28 [(95% CI-1.61 - 3.24) p < 0.001] times increased odds of being overweight and obese. Television watching of mothers is associated with childhood overweight and obesity and is one of the most public health concerns in Bangladesh. These changes may be in part of better socio-economic condition, changes in life style behaviour and dietary pattern.
文摘Proceeding from the specific characteristics of PAL television signals adopted in China this paper points out that if the fs = 2fsc of sub-Nyquist sampling and DPCM encoding is used for PAL complete signal and if the blanking time is utilized to transmit code of effective area, it is possible to transmit a color TV signal over PCM three-group channel.
文摘The DVB-T (Digital Video Broadcasting—Terrestrial) standard is being deployed in many parts of the world for digital broadcasting services, providing a variety of features extending the capabilities of the older analog ones. In this paper, a two-stage low noise amplifier (LNA) is designed for use with the DVB-T standard. The design is employed based on microstrip. The microwave design meets all the specifications required, achieving input and output return loss below ?10 dB, high gain of 35 dB and high linearity. Low noise figure of 1.3 dB is achieved with the use of pHEMT transistor technology.
文摘The development course of China's meteorological movie and television was analyzed firstly, and then the improvement strategies of meteorological movie and television services facing public needs were put forward based on the statistical results of a meteorological service questionnaire.
基金Leading Academic Discipline Project of Shanghai Municipal Education Commission,China(No.J51801)Foundation of Shanghai Second Polytechnic University,China(No.QD209008)
文摘A new architecture for digital television (DTV) delivery based on Ethernet was presented. In this architecture, new protocol stack and packet encapsulation were proposed to help implementation of DTV services over Ethernet link. A simple quality of service (QoS) structure was provided in traffic control of nodes to achieve QoS requirements of DTV delivery. Experiments were proceeded successfully to implement the idea. Finally, a short evaluation to QoS provisions was given, achieving good results.
文摘Dissemination of information to citizens is a relevant component of governance. Expectedly, viewers tuned to broadcast stations within and outside their localities, expecting their receivers to faithfully reproduce the exact features of the transmitted signal. Akpabuyo is a dense forest zone near the creeks leading to the Atlantic ocean in Cross River State, Nigeria. The location has distinct environmental characteristics that made Akpabuyo Area Council, a challenging location to propagate electromagnetic waves;and therefore recipe for further investigation. Radio frequency analyzer, with 24 channels spectrum, ranging between 46 - 870 MHz (model: RO.VE.R.-“DLM3-T”) was deployed to capture signals from terrestrial television stations (TV). CATV measured signal of TV stations in dB, dBμV and dBmV. Its frequency ranged from 40 - 860 MHz;while varying from channel 1 to channel 69. Measurements taken from Akpabuyo L.G.A. showed the following results: the signal strength received from VHF Channel 11 ranged from 20 dBμV to 49 dBμV. From recorded empirical statistics from the study, 50% of the area received signal from this station above 30 dBμV, while other regions had signals below this value;representing the fringe zone of the frequency. The results obtained from the study relatively showed acceptance with Egli’s model. The study recorded a steady fluctuation between 17 dBμV and 19 dBμV from both propagating stations. However, Channel 27 signal at 519 MHz, had very weak signal coverage in Akpabuyo Local Government Area;with signal strength dropped to as low as 13 dB in many parts of the rural area. The study discovered that the state’s broadcasting stations, both at UHF and VHF channels did not transmit successfully across this densely forest (rural) location. Remedial measures such as installing Repeater stations at different locations as signal booster were recommended.
文摘The invention and development of television art is closely connected with scientific research. The historic facts have witnessed the influence of scientific research progress on the development of television art. In this paper, the author intends to reveal some phenomenal facts which are known by very few people, namely, the first ever appearance of electronic television in Uzbekistan. This paper gives us some authentic and valuable historic materials for the invention and development of television set in the world.
基金Project (No. zk043093) supported by the Introduced Talent Founda-tion of Southwest University of Science and Technology, China
文摘This paper introduces a method to realize digital television transmission based on asynchronous transfer mode (ATM), a technology based on fast packet switching. Choosing the integral multiple length of an ATM cell payload to equal to the length of an MPEG transport stream packet, an MPEG transport stream packet can be inextenso loaded by several ATM cells and trans-formed into ATM cells. Using ATM virtual connection technology and B-ISDN, the interoperability between ATM and DTV may be realized, and DTV signal transmission may also be realized finally.
文摘This study investigates the current situation of the film and television education in primary and secondary schools in China. The purpose is to find out the problems existing in the current film and television education in primary and secondary schools, and give improvement measures. A questionnaire was designed in this study and teachers in 89 primary and secondary schools in Liaocheng City, Shandong Province filled in the questionnaires. A total of 355 valid questionnaires were collected. This study analyzed the survey data, and drawn a series of conclusions about the current situation of film and television education in primary and secondary schools on the basis of data analysis. Based on the results of the survey, some suggestions are given to provide reference for the development of film and television education in primary and secondary schools.
文摘A modular flat-screen liquid crystal television display is described.The picture elements of the modules may be emissive,reflective or transmissive.The flat-screen liquid crystal television also comprised of an electrical control circuit capable of categorizing incoming television picture signals corresponding to the modules in the array and directing the electrical signals to the drive circuits of each module according to the portion of the television picture to be reproduced by the picture elements of that module.The picture elements are preferably formed in a light modulating film composed of a liquid crystal dispersion in a polymeric binder.A color display was also produced by placing a patterned red-green-blue filter adjacent the active matrix so that each picture element could also be coordinated with the color components of a color video signal.