在电视节目的制作和播出中,为了改善信号,提高图像质量,我们经常运用时基校正器来对图像信号进行控制、校正和处理。日本朋荣公司(FOR.A Company Ltd)近年推出的FOR.A系列时基校正器是一种功能多、性能好的图像信号处理设备,它可接受多...在电视节目的制作和播出中,为了改善信号,提高图像质量,我们经常运用时基校正器来对图像信号进行控制、校正和处理。日本朋荣公司(FOR.A Company Ltd)近年推出的FOR.A系列时基校正器是一种功能多、性能好的图像信号处理设备,它可接受多种格式的图像信号,如复合视频、Y/C443、YP BP R或Y/C DUB等。展开更多
Transmitter identification(TxID) technique is used to diagnose the operation status of radio transmitters in DTV distributed transmission network.A new TxID method for digital video broadcasting-handheld (DVB-H) syste...Transmitter identification(TxID) technique is used to diagnose the operation status of radio transmitters in DTV distributed transmission network.A new TxID method for digital video broadcasting-handheld (DVB-H) system is proposed.Watermark is embedded in the DVB-H signal to form the composite signal.According to watermarking theory we demonstrate the required signal level for watermarking signal to achieve given bit error probability under different circumstance.By selecting the reference pattern to generate watermarking signal,peak-to-average power ratio(PAPR) of the transmitted signal can be improved.Simulation results show that even in wireless situation the receiver can distinguish the watermarking signal with low embedding strength, and distortion to the host signal can also be ignored.展开更多
文摘在电视节目的制作和播出中,为了改善信号,提高图像质量,我们经常运用时基校正器来对图像信号进行控制、校正和处理。日本朋荣公司(FOR.A Company Ltd)近年推出的FOR.A系列时基校正器是一种功能多、性能好的图像信号处理设备,它可接受多种格式的图像信号,如复合视频、Y/C443、YP BP R或Y/C DUB等。
文摘Transmitter identification(TxID) technique is used to diagnose the operation status of radio transmitters in DTV distributed transmission network.A new TxID method for digital video broadcasting-handheld (DVB-H) system is proposed.Watermark is embedded in the DVB-H signal to form the composite signal.According to watermarking theory we demonstrate the required signal level for watermarking signal to achieve given bit error probability under different circumstance.By selecting the reference pattern to generate watermarking signal,peak-to-average power ratio(PAPR) of the transmitted signal can be improved.Simulation results show that even in wireless situation the receiver can distinguish the watermarking signal with low embedding strength, and distortion to the host signal can also be ignored.