H.265 is a new video coding standard established after ITU-T VCEG followed by ITU-T VCEG followed. The H.265 standard surrounds the existing video coding standard H.264, reserves the original technologies, and improves some related technologies. New technology uses advanced technology to improve the relationship between code stream, coding quality, delay and algorithm complexity, reaching optimization settings. Specific research contents include: increasing compression efficiency, improving robustness and error recovery capabilities, reducing real-time delays, reducing channel acquisition time and random access delay, reducing complexity, etc. Since the algorithm optimization, the H265 can be achieved at a speed of less than 1 Mbps, and H265 can realize the transfer of 720P (resolution 1280 * 720) to transmit 720P (resolution 1280 * 720) to transmit the transmission speed of 1 to 2 mbps. The technological advantage of H.265 highlights 1, larger macroblocks and transform blocks. The H.265 introduced 32 × 32, 64 × 64 or even 128 × 32, 64 × 64 or even 128 × 128 macroblocks, which is the purpose of reducing the macro of HD digital video. The number of blocks reduces the parameter information used to describe the content of the macroblock, and the shaping conversion block size is also expanded, and the similarity coefficients for reducing the phase neighboring block in H.264. 2, use new MV (motion vector) forecasting method. Different from H.264 Sport Vector Prediction Method Based on Spatial Domain, H.265 expands more directions to perform intra prediction, and expands the set of prediction blocks from the original spatial domain to time domain and empty mixed domain, pass rate After the distortion criterion is calculated, select the best predictive block. Using this method, in the basic mode, in the case of the same quality as H.264, the compressed gain of 6.1% is obtained, and the compression gain of the complex image can even be increased to 20%. 3, more consider parallelization design. The current chip architecture has gradually developed from single nuclear performance, and H.265 introduces ENTROPYSLICE, WPP, etc. Parallel operational ideas, using a higher code algorithm, more beneficial to H.265 in GPU / DSP / FPGA / ASIC is highly efficient in CPUs in CPUs in CPUs to achieve industrialization. 4, multi-core processors are gradually replacing traditional single-parallelism to become the mainstream of the market with high performance and low power advantages. With the expansion of application requirements and technological advances, the multi-core must show its more powerful performance advantages. H.265 Video coding technology will consider parallel when designing. The newly added TILE division mechanism makes the coarse granular data parallel mechanism in the previous SLICE, frame, or GOP more suitable for parallel implementations on the holy multi-core processor. The DependentSlice and WPP mechanisms solved the problem of entropy coding links in the previous coding technique in the past, making the DCT, motion estimation, motion compensation, entropy coding of the entire codec, more balanced, significantly improved Parallel acceleration ratio. For us: In the case of quality, H.265 standard is half the bandwidth of H.264 standard province. In the case of low bandwidth, H.265 can make you get a delicate image quality, rich image details, smooth and natural playback effect. "The bandwidth, the sharpness doubles" so obvious advantage is undoubtedly "dry seedling rain" for the video website. At present, many video sites have provided H.265 video standards. We can not only transfer and watch online HD videos on the broadband in the family, but also enjoy these services in devices such as mobile phones and tablets! Under the same image quality, the video size encoded by H.265 is reduced by approximately 39-44% compared to H.264. This data will also have corresponding changes due to differences in quality control measurement. Through the data derived by subjective visual test, the quality of the H.265 encoded video can be approximately even better with the H.264 encoding video in the case of a decrease of 51-74%. H.265 will analyze if there is a moving screen in each frame, and then compress the portion where the change is changed. If the more static frames, the higher the compression ratio, because the portion of the 90% of the video has not changed, such compression ensures that the compression efficiency does not reduce the picture quality. The application of the H.265 standard is the general trend!
Since the compression ratio is greatly improved, H.265 also puts more demanding requirements for hardware. H.265 decoded theoretical operation of H.264 is 1.7 ~ 2.0 times, before dual-core A9 + single-core GPU is equipped with H.264 video, but to H.265 video can only make you enjoy slide - - At least quad-core A9 + quad-core GPU has sufficient computational horsepower to deal with.
H.265 is a new video coding standard established after ITU-T VCEG followed by ITU-T VCEG followed. The H.265 standard surrounds the existing video coding standard H.264, reserves the original technologies, and improves some related technologies. New technology uses advanced technology to improve the relationship between code stream, coding quality, delay and algorithm complexity, reaching optimization settings. Specific research contents include: increasing compression efficiency, improving robustness and error recovery capabilities, reducing real-time delays, reducing channel acquisition time and random access delay, reducing complexity, etc. Since the algorithm optimization, the H265 can be achieved at a speed of less than 1 Mbps, and H265 can realize the transfer of 720P (resolution 1280 * 720) to transmit 720P (resolution 1280 * 720) to transmit the transmission speed of 1 to 2 mbps. The technological advantage of H.265 highlights 1, larger macroblocks and transform blocks. The H.265 introduced 32 × 32, 64 × 64 or even 128 × 32, 64 × 64 or even 128 × 128 macroblocks, which is the purpose of reducing the macro of HD digital video. The number of blocks reduces the parameter information used to describe the content of the macroblock, and the shaping conversion block size is also expanded, and the similarity coefficients for reducing the phase neighboring block in H.264. 2, use new MV (motion vector) forecasting method. Different from H.264 Sport Vector Prediction Method Based on Spatial Domain, H.265 expands more directions to perform intra prediction, and expands the set of prediction blocks from the original spatial domain to time domain and empty mixed domain, pass rate After the distortion criterion is calculated, select the best predictive block. Using this method, in the basic mode, in the case of the same quality as H.264, the compressed gain of 6.1% is obtained, and the compression gain of the complex image can even be increased to 20%. 3, more consider parallelization design. The current chip architecture has gradually developed from single nuclear performance, and H.265 introduces ENTROPYSLICE, WPP, etc. Parallel operational ideas, using a higher code algorithm, more beneficial to H.265 in GPU / DSP / FPGA / ASIC is highly efficient in CPUs in CPUs in CPUs to achieve industrialization. 4, multi-core processors are gradually replacing traditional single-parallelism to become the mainstream of the market with high performance and low power advantages. With the expansion of application requirements and technological advances, the multi-core must show its more powerful performance advantages. H.265 Video coding technology will consider parallel when designing. The newly added TILE division mechanism makes the coarse granular data parallel mechanism in the previous SLICE, frame, or GOP more suitable for parallel implementations on the holy multi-core processor. The DependentSlice and WPP mechanisms solved the problem of entropy coding links in the previous coding technique in the past, making the DCT, motion estimation, motion compensation, entropy coding of the entire codec, more balanced, significantly improved Parallel acceleration ratio. For us: In the case of quality, H.265 standard is half the bandwidth of H.264 standard province. In the case of low bandwidth, H.265 can make you get a delicate image quality, rich image details, smooth and natural playback effect. "The bandwidth, the sharpness doubles" so obvious advantage is undoubtedly "dry seedling rain" for the video website. At present, many video sites have provided H.265 video standards. We can not only transfer and watch online HD videos on the broadband in the family, but also enjoy these services in devices such as mobile phones and tablets! Under the same image quality, the video size encoded by H.265 is reduced by approximately 39-44% compared to H.264. This data will also have corresponding changes due to differences in quality control measurement. Through the data derived by subjective visual test, the quality of the H.265 encoded video can be approximately even better with the H.264 encoding video in the case of a decrease of 51-74%. H.265 will analyze if there is a moving screen in each frame, and then compress the portion where the change is changed. If the more static frames, the higher the compression ratio, because the portion of the 90% of the video has not changed, such compression ensures that the compression efficiency does not reduce the picture quality. The application of the H.265 standard is the general trend! Since the compression ratio is greatly improved, H.265 also puts more demanding requirements for hardware. H.265 decoded theoretical operation of H.264 is 1.7 ~ 2.0 times, before dual-core A9 + single-core GPU is equipped with H.264 video, but to H.265 video can only make you enjoy slide - - At least quad-core A9 + quad-core GPU has sufficient computational horsepower to deal with.
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