Audio Video Coding Standard （AVS） is a second-generation source coding standard and the first standard for audio and video coding in China with independent intellectual property rights. Its performance has reached t...Audio Video Coding Standard （AVS） is a second-generation source coding standard and the first standard for audio and video coding in China with independent intellectual property rights. Its performance has reached the international standard. Its coding efficiency is 2 to 3 times greater than that of MPEG -2. This technical solution is more simple, and it can greatly save channel resource. After more than ten years＇ development, AVS has achieved great success. The latest version of the AVS audio coding standard is ongoing and mainly aims at the increasing demand for low bitrate and high quality audio services. The paper reviews the history and recent development of AVS audio coding standard in terms of basic features, key techniques and performance. Finally, the future development of AVS audio coding standard is discussed.展开更多
Audio Video coding Standard (AVS) is the latest audio and video coding standard of China. AVS Part 7 (also known as AVS-M) targets mobility applications where error concealment is of great importance. This paper first...Audio Video coding Standard (AVS) is the latest audio and video coding standard of China. AVS Part 7 (also known as AVS-M) targets mobility applications where error concealment is of great importance. This paper first briefly introduces the general concept of error concealment. Then two error concealment schemes are proposed and implemented on AVS-M decoder under different test conditions. Simulation results of the schemes and suggestions on how to use these tools are also provided.展开更多
为了面向低延时的浅压缩场景提供更加适配的编码方案,并降低硬件实现成本,提出一种基于数字音视频编解码技术标准(Audio Video coding Standard,AVS)浅压缩算法的帧内预测模式优化以及快速率失真优化算法。该算法通过减少原有算法帧内...为了面向低延时的浅压缩场景提供更加适配的编码方案,并降低硬件实现成本,提出一种基于数字音视频编解码技术标准(Audio Video coding Standard,AVS)浅压缩算法的帧内预测模式优化以及快速率失真优化算法。该算法通过减少原有算法帧内预测所需的预测循环次数,以及打破各块之间的数据依赖关系等措施,克服了原始方案不适合硬件流水并行处理的限制,提高了编码的效率和稳定性,从而既保障了算法的视频质量,又使新的硬件实现方案更符合实际应用需求。实验结果表明,该算法优化方案能够有效改善实际面向低延时浅压缩场景下的编码效果。展开更多
In this paper we present a motion compensation (MC) design for the newest Audio Video coding Standard (AVS) of China. Because of compression-efficient techniques of variable block size (VBS) and sub-pixel interpolatio...In this paper we present a motion compensation (MC) design for the newest Audio Video coding Standard (AVS) of China. Because of compression-efficient techniques of variable block size (VBS) and sub-pixel interpolation, intensive pixel calculation and huge memory access are required. We propose a parallel serial filtering mixed luma interpolation data flow and a three-stage multiplication free chroma interpolation scheme. Compared to the conventional designs, the integrated architecture supports about 2.7 times filtering throughput. The proposed MC design utilizes Vertical Z processing order for reference data re-use and saves up to 30% memory bandwidth. The whole design requires 44.3k gates when synthesized at 108 MHz clock frequency using 0.18-μm CMOS technology and can support up to 1920×1088@30 fps AVS HDTV video decoding.展开更多
A new video watermarking method for the Audio Video coding Standard (AVS) is proposed. According to human visual masking properties, this method determines the region of interest for watermark embedding by analyzing v...A new video watermarking method for the Audio Video coding Standard (AVS) is proposed. According to human visual masking properties, this method determines the region of interest for watermark embedding by analyzing video semantics, and generates dynamic robust watermark according to video motion semantics, and embeds watermarks in the Intermediate Frequency (IF) Discrete Cosine Transform (DCT) coefficients of the luminance sub-block prediction residual in the region of interest. This method controls watermark embedding strength adaptively by video textures semantics. Ex- periments show that this method is robust not only to various conventional attacks, but also to re-frame, frame cropping, frame deletion and other video-specific attacks.展开更多
Block matching has been used for motion estimation and motion compensation in the Au- dio and Video Standard (AVS) for years. While having an acceptable performance in describing mo- tion between frames, it requires q...Block matching has been used for motion estimation and motion compensation in the Au- dio and Video Standard (AVS) for years. While having an acceptable performance in describing mo- tion between frames, it requires quite a few bits to represent the motion vectors. In certain circum- stances, the use of global motion estimation and compensation would perform equally well or even better than the block matching in terms of motion accuracy, while it results in the coding of global motion model parameters. In this letter, we modify an AVS coder by adding (1) six global motion model parameters to the frame header, and (2) mode selection among INTRA, SKIP, INTER-16×16, INTER-16×8, INTER-8×16, INTER-8×8, and Global Motion Compensation (GMC) modes by La- grange optimal rate-distortion criteria. Simulation results demonstrate that over 0.1dB improvement in PSNR is obtained compared to the AVS coder for an average coded P-frame with the same bit- rate.展开更多
针对屏幕与混合内容视频具有多样性的特点,在我国第二代数字音视频编解码技术标准的屏幕与混合内容视频编码(the second-generation Audio Video Coding Standard Screen and Mixed Content Coding, AVS2-SMCC)扩展版中,提出了由一般串...针对屏幕与混合内容视频具有多样性的特点,在我国第二代数字音视频编解码技术标准的屏幕与混合内容视频编码(the second-generation Audio Video Coding Standard Screen and Mixed Content Coding, AVS2-SMCC)扩展版中,提出了由一般串模式、第一受限串模式和第二受限串模式三种受限串模式组成的通用串预测算法(Universal String Prediction, USP)及其关键技术,其主要部分已经被AVS2-SMCC扩展版工作草案3.0稿采纳.三种受限串模式统一采用偏移串、坐标串和不可预测像素串三种串类型之一或其组合来实现.当编码单元采用USP算法进行编码时,用三种受限串模式对其分别进行预编码,自适应采用三种受限串模式中取得率失真值最小的受限串模式对其进行编码.实验结果表明,对于AVS2-SMCC通用测试序列中移动的文字和图形类别,提出的USP算法与国际上最新的(High Efficiency Video Coding, HEVC)标准SMCC扩展版(High Efficiency Video Coding-Screen Content Coding, HEVC-SCC)相比,在编解码复杂度增加较少的情况下,对于有损全帧内配置 Y 分量、 U 分量、 V 分量平均BD - rate降低率分别可达23.2%、18.3%、19.4%,基于CPSNR的三分量综合的平均BD - rate降低率为22.1%,编码效率已经大幅超过HEVC-SCC.展开更多
AVS(audio video coding standard)工作组是"数字音视频编解码技术标准"工作组的简称,由国家原信息产业部科学技术司于2002年6月批准成立.工作组的任务是制(修)订数字音视频的压缩、解压缩、处理和表示等共性技术标准,为数字...AVS(audio video coding standard)工作组是"数字音视频编解码技术标准"工作组的简称,由国家原信息产业部科学技术司于2002年6月批准成立.工作组的任务是制(修)订数字音视频的压缩、解压缩、处理和表示等共性技术标准,为数字音视频设备与系统提供高效经济的编解码技术.经过10多年的努力,AVS已经成功制定一系列标准,如AVS1,AVS+和AVS2.其中AVS1和AVS2的说法源于AVS第1阶段和第2阶段的工作或第1代、第2代标准.AVS+是工作组专门为高清数字电视广播制定的一个标准.目前AVS1和AVS+标准已经制定完成并成功应用于许多行业中,AVS2也即将完成.将对AVS的AVS视频标准12年来的技术发展过程给以概述,并简单介绍目前最新一代视频编码标准AVS2关键技术,最后对视频编码技术的未来发展方向予以展望.展开更多
文摘Audio Video Coding Standard （AVS） is a second-generation source coding standard and the first standard for audio and video coding in China with independent intellectual property rights. Its performance has reached the international standard. Its coding efficiency is 2 to 3 times greater than that of MPEG -2. This technical solution is more simple, and it can greatly save channel resource. After more than ten years＇ development, AVS has achieved great success. The latest version of the AVS audio coding standard is ongoing and mainly aims at the increasing demand for low bitrate and high quality audio services. The paper reviews the history and recent development of AVS audio coding standard in terms of basic features, key techniques and performance. Finally, the future development of AVS audio coding standard is discussed.
基金Project (No. 60333020) supported by the National Natural Science Foundation of China
文摘Audio Video coding Standard (AVS) is the latest audio and video coding standard of China. AVS Part 7 (also known as AVS-M) targets mobility applications where error concealment is of great importance. This paper first briefly introduces the general concept of error concealment. Then two error concealment schemes are proposed and implemented on AVS-M decoder under different test conditions. Simulation results of the schemes and suggestions on how to use these tools are also provided.
文摘为了面向低延时的浅压缩场景提供更加适配的编码方案,并降低硬件实现成本,提出一种基于数字音视频编解码技术标准(Audio Video coding Standard,AVS)浅压缩算法的帧内预测模式优化以及快速率失真优化算法。该算法通过减少原有算法帧内预测所需的预测循环次数,以及打破各块之间的数据依赖关系等措施,克服了原始方案不适合硬件流水并行处理的限制,提高了编码的效率和稳定性,从而既保障了算法的视频质量,又使新的硬件实现方案更符合实际应用需求。实验结果表明,该算法优化方案能够有效改善实际面向低延时浅压缩场景下的编码效果。
基金(No. Y106574) supported by the Natural Science Foundationof Zhejiang Province, China
文摘In this paper we present a motion compensation (MC) design for the newest Audio Video coding Standard (AVS) of China. Because of compression-efficient techniques of variable block size (VBS) and sub-pixel interpolation, intensive pixel calculation and huge memory access are required. We propose a parallel serial filtering mixed luma interpolation data flow and a three-stage multiplication free chroma interpolation scheme. Compared to the conventional designs, the integrated architecture supports about 2.7 times filtering throughput. The proposed MC design utilizes Vertical Z processing order for reference data re-use and saves up to 30% memory bandwidth. The whole design requires 44.3k gates when synthesized at 108 MHz clock frequency using 0.18-μm CMOS technology and can support up to 1920×1088@30 fps AVS HDTV video decoding.
基金Supported by the Natural Science Foundation of Shaanxi Province (SJ08F15)the Industry Tackling Project of Shaanxi Province (2010K06-20)the National Natural Science Foundation of China and Civil Aviation Ad-ministration of China (No. 61072110)
文摘A new video watermarking method for the Audio Video coding Standard (AVS) is proposed. According to human visual masking properties, this method determines the region of interest for watermark embedding by analyzing video semantics, and generates dynamic robust watermark according to video motion semantics, and embeds watermarks in the Intermediate Frequency (IF) Discrete Cosine Transform (DCT) coefficients of the luminance sub-block prediction residual in the region of interest. This method controls watermark embedding strength adaptively by video textures semantics. Ex- periments show that this method is robust not only to various conventional attacks, but also to re-frame, frame cropping, frame deletion and other video-specific attacks.
基金Supported by the National Natural Science Foundation of China (60673092)Natural science Foundation of Ji-angsu Province (No.BK2003029)the Key Laboratory Project of Information Science & Engineering of Railway of the Ministry of Railways, China (No.TDXX0501).
文摘Block matching has been used for motion estimation and motion compensation in the Au- dio and Video Standard (AVS) for years. While having an acceptable performance in describing mo- tion between frames, it requires quite a few bits to represent the motion vectors. In certain circum- stances, the use of global motion estimation and compensation would perform equally well or even better than the block matching in terms of motion accuracy, while it results in the coding of global motion model parameters. In this letter, we modify an AVS coder by adding (1) six global motion model parameters to the frame header, and (2) mode selection among INTRA, SKIP, INTER-16×16, INTER-16×8, INTER-8×16, INTER-8×8, and Global Motion Compensation (GMC) modes by La- grange optimal rate-distortion criteria. Simulation results demonstrate that over 0.1dB improvement in PSNR is obtained compared to the AVS coder for an average coded P-frame with the same bit- rate.
文摘针对屏幕与混合内容视频具有多样性的特点,在我国第二代数字音视频编解码技术标准的屏幕与混合内容视频编码(the second-generation Audio Video Coding Standard Screen and Mixed Content Coding, AVS2-SMCC)扩展版中,提出了由一般串模式、第一受限串模式和第二受限串模式三种受限串模式组成的通用串预测算法(Universal String Prediction, USP)及其关键技术,其主要部分已经被AVS2-SMCC扩展版工作草案3.0稿采纳.三种受限串模式统一采用偏移串、坐标串和不可预测像素串三种串类型之一或其组合来实现.当编码单元采用USP算法进行编码时,用三种受限串模式对其分别进行预编码,自适应采用三种受限串模式中取得率失真值最小的受限串模式对其进行编码.实验结果表明,对于AVS2-SMCC通用测试序列中移动的文字和图形类别,提出的USP算法与国际上最新的(High Efficiency Video Coding, HEVC)标准SMCC扩展版(High Efficiency Video Coding-Screen Content Coding, HEVC-SCC)相比,在编解码复杂度增加较少的情况下,对于有损全帧内配置 Y 分量、 U 分量、 V 分量平均BD - rate降低率分别可达23.2%、18.3%、19.4%,基于CPSNR的三分量综合的平均BD - rate降低率为22.1%,编码效率已经大幅超过HEVC-SCC.
文摘AVS(audio video coding standard)工作组是"数字音视频编解码技术标准"工作组的简称,由国家原信息产业部科学技术司于2002年6月批准成立.工作组的任务是制(修)订数字音视频的压缩、解压缩、处理和表示等共性技术标准,为数字音视频设备与系统提供高效经济的编解码技术.经过10多年的努力,AVS已经成功制定一系列标准,如AVS1,AVS+和AVS2.其中AVS1和AVS2的说法源于AVS第1阶段和第2阶段的工作或第1代、第2代标准.AVS+是工作组专门为高清数字电视广播制定的一个标准.目前AVS1和AVS+标准已经制定完成并成功应用于许多行业中,AVS2也即将完成.将对AVS的AVS视频标准12年来的技术发展过程给以概述,并简单介绍目前最新一代视频编码标准AVS2关键技术,最后对视频编码技术的未来发展方向予以展望.
