H.265 is a new video coding standard developed by ITU-T VCEG following H.264. The H.265 standard revolves around the existing video coding standard H.264, retaining some of the original technologies and at the same time improving some related technologies. The new technology uses advanced techniques to improve the relationship between codestream, encoding quality, latency, and algorithm complexity to achieve optimal settings. The specific research contents include: improving compression efficiency, improving robustness and error recovery capability, reducing real-time delay, reducing channel acquisition time and random access delay, and reducing complexity. Due to the algorithm optimization, H264 can implement standard definition digital image transmission at a speed of less than 1 Mbps. The H265 can realize transmission of 720P (resolution 1280720) ordinary high-definition audio and video transmission at a transmission rate of 1 to 2 Mbps.
In August 2012, Ericsson launched the first H.265[sup][1][/sup] codec, and after just six months, the ITU officially approved the adoption of HEVC/ The H.265 standard, which is called the High Efficiency Video Coding, is considerably improved compared to the previous H.264 standard. China's Huawei has the most core patents and is the leader of the standard.
H.265 aims to transmit higher-quality network video under limited bandwidth, and only needs the original half bandwidth to play the same quality video. This also means that our smartphones, tablets and other mobile devices will be able to play 1080p full HD video directly online. The H.265 standard also supports 4K (4096×2160) and 8K (8192×4320) Ultra HD video. It can be said that the H.265 standard allows online video to keep up with the "high resolution" display.
Within a few months, you may see devices that support H.265 decoding available (such as smart phones, video cards, etc.). H.264 dominated the past five years, and in the next five or even ten years, H.265 is likely to become mainstream.
Transmission rate H.263 can realize standard definition broadcast digital TV at the transmission speed of 2~4Mbps (according to CCIR601 and CCIR656 standard requirements 720576); and H.264 can achieve standard definition digital image below 2Mbps due to algorithm optimization. Transmission; H.265 High Profile can achieve less than 1.5Mbps transmission bandwidth, 1080p full HD video transmission.
In addition to the improvement in codec efficiency, H.265 has also been significantly improved in terms of adaptability to the network, and it can run well under complex network conditions such as the Internet.
Performance Improvement In motion prediction, the next-generation algorithm will no longer follow the "macroblock" method of image segmentation, but may use object-oriented methods to directly identify the moving subjects in the image. In terms of transformation, the next-generation algorithm may no longer follow the Fourier transform-based algorithm family, there are many articles in the discussion, which drew attention to the so-called "overcomplete transformation", the main features are: in its MxN transformation matrix, M is greater than N Even larger than N, the transformed vector is relatively large, but there are many 0 elements. After the entropy coding, the information stream with higher compression ratio can be obtained.
With respect to computational complexity, H.264 has more than doubled the compression efficiency of MPEG-2, at the cost of at least a 4x increase in computational complexity, resulting in high-definition encoding requiring 100G OPS peak computation capability. In spite of this, it is still possible to use the mainstream IC technology and general design technology in 2013 to design a dedicated hardware circuit that achieves the above capabilities, and maintain its mass production cost at the original level. After 5 years (or perhaps longer), new technologies were accepted as standards, and their compression efficiency should be at least 1x higher than H.264. It is estimated that the demand for calculations will still increase by more than 4 times. With the rapid progress of semiconductor technology, it is believed that the mass production cost of dedicated chips for realizing new technologies at that time should not be significantly improved. Therefore, 500GOPS may be the upper limit of the new technology's demand for computing power.
In August 2012, Ericsson launched the first H.265[sup][1][/sup] codec, and after just six months, the ITU officially approved the adoption of HEVC/ The H.265 standard, which is called the High Efficiency Video Coding, is considerably improved compared to the previous H.264 standard. China's Huawei has the most core patents and is the leader of the standard.
H.265 aims to transmit higher-quality network video under limited bandwidth, and only needs the original half bandwidth to play the same quality video. This also means that our smartphones, tablets and other mobile devices will be able to play 1080p full HD video directly online. The H.265 standard also supports 4K (4096×2160) and 8K (8192×4320) Ultra HD video. It can be said that the H.265 standard allows online video to keep up with the "high resolution" display.
Within a few months, you may see devices that support H.265 decoding available (such as smart phones, video cards, etc.). H.264 dominated the past five years, and in the next five or even ten years, H.265 is likely to become mainstream.
Transmission rate H.263 can realize standard definition broadcast digital TV at the transmission speed of 2~4Mbps (according to CCIR601 and CCIR656 standard requirements 720576); and H.264 can achieve standard definition digital image below 2Mbps due to algorithm optimization. Transmission; H.265 High Profile can achieve less than 1.5Mbps transmission bandwidth, 1080p full HD video transmission.
In addition to the improvement in codec efficiency, H.265 has also been significantly improved in terms of adaptability to the network, and it can run well under complex network conditions such as the Internet.
Performance Improvement In motion prediction, the next-generation algorithm will no longer follow the "macroblock" method of image segmentation, but may use object-oriented methods to directly identify the moving subjects in the image. In terms of transformation, the next-generation algorithm may no longer follow the Fourier transform-based algorithm family, there are many articles in the discussion, which drew attention to the so-called "overcomplete transformation", the main features are: in its MxN transformation matrix, M is greater than N Even larger than N, the transformed vector is relatively large, but there are many 0 elements. After the entropy coding, the information stream with higher compression ratio can be obtained.
With respect to computational complexity, H.264 has more than doubled the compression efficiency of MPEG-2, at the cost of at least a 4x increase in computational complexity, resulting in high-definition encoding requiring 100G OPS peak computation capability. In spite of this, it is still possible to use the mainstream IC technology and general design technology in 2013 to design a dedicated hardware circuit that achieves the above capabilities, and maintain its mass production cost at the original level. After 5 years (or perhaps longer), new technologies were accepted as standards, and their compression efficiency should be at least 1x higher than H.264. It is estimated that the demand for calculations will still increase by more than 4 times. With the rapid progress of semiconductor technology, it is believed that the mass production cost of dedicated chips for realizing new technologies at that time should not be significantly improved. Therefore, 500GOPS may be the upper limit of the new technology's demand for computing power.
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