H.264 based multichannel video transcoding multiplexing method and multiplexer

A multi-channel video and video transcoding technology, which is applied in the direction of digital video signal modification, TV, and pulse-modulated TV signal transmission, etc., can solve the problem that does not involve the method and multiplexer based on H.264 multi-channel video transcoding multiplexing And other issues

Inactive Publication Date: 2007-11-07
NANJING UNIV
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Problems solved by technology

[0005] The method and multiplexer based on H.264 multiplex v...

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  • H.264 based multichannel video transcoding multiplexing method and multiplexer
  • H.264 based multichannel video transcoding multiplexing method and multiplexer
  • H.264 based multichannel video transcoding multiplexing method and multiplexer

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Embodiment Construction

[0050] In the mobile digital TV system based on MPEG-2, the video content mainly comes from the MPEG-2 program library, satellite TV, and live video programs. Multiple MPEG-2 program streams are multiplexed through the multiplexer and then channel coded. Modulation, and then digital TV wireless transmission.

[0051] After introducing the H.264-based video transcoding multiplexer, the system architecture is shown in Figure 5. It actually moves the MPEG-2 program library and MPEG-2 program stream forward. On the one hand, the H.264 video program library is established through static transcoding for selection by the playback system; The MPEG-2 program stream is dynamically transcoded in real time to reduce the bit rate of the video stream, change the spatial resolution and frame rate of the video stream, and adapt to the transmission requirements of the backend. After transcoding, multiple sets of H.264 programs are synthesized into one TS stream for transmission through softwa...

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Abstract

An escape-code complexing method based on H.264 multi-path video includes applying fast conversion means of MPEG-2 to H.264 code and utilizing H.264 macro-block mode to select relativity to MPEG-2 motion compensation residual error as well as utilizing motion compensation residual error and MB mode as well as mapped H.264 macro-block mode obtained by MPEG-2 decoding to synthesize TS stream and to input multi-path MPEG-2 program stream to escape code complex server by SI interface through PCI bus and outputting escape-coded and complexed single H.264 video stream through PCI bus in ASI interface mode.

Description

technical field [0001] The invention belongs to the field of video compression encoding and multiplexing in digital television. In particular, it relates to a method and a multiplexer based on H.264 multiplex video transcoding and multiplexing. Background technique [0002] In recent years, mobile digital TV has developed rapidly in China, but the image bandwidth restricts the expansion of digital video services. In order to give consideration to both code stream transmission efficiency and video image quality, the usual transmission rate of the system is 6-10Mbps. However, most digital TV video recording programs adopt the MPEG-2 video compression standard, and the image size is relatively large. For example, the standard definition MPEG-2 bit rate is about 4Mbps, and the high definition MPEG-2 bit rate is about 10Mbps. The bandwidth of mobile digital TV users is generally difficult to meet the real-time transmission of multiple high-bit-rate video streams. In order to e...

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Application Information

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IPC IPC(8): H04N7/30H04N7/26H04N7/52H04N19/40H04N21/44
Inventor 方怀东柳翀鹿宝生严肃陈启美
Owner NANJING UNIV
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