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A MPEG-2 to AVS video code stream conversion method and apparatus

An MPEG-2, format conversion technology, applied in the field of video transmission, to achieve the effect of avoiding mode selection algorithm and fast conversion

Inactive Publication Date: 2005-09-21
联合信源数字音频技术(北京)有限公司
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Problems solved by technology

There is a problem of converting from a single mode to a multi-mode

Method used

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  • A MPEG-2 to AVS video code stream conversion method and apparatus
  • A MPEG-2 to AVS video code stream conversion method and apparatus
  • A MPEG-2 to AVS video code stream conversion method and apparatus

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Embodiment Construction

[0035] The technical solutions of the present invention will be described in detail below in conjunction with specific embodiments of the present invention.

[0036] MPEG-2 video algorithm is a hybrid coding algorithm - motion compensation discrete cosine transform algorithm. This algorithm belongs to the first generation of video compression algorithm. It adopts block (Block) structure and is suitable for different signals. It mainly includes the following contents: time domain prediction: reduce the time redundancy of video images; frequency domain decomposition: use DCT (discrete Cosine transform) decomposes the spatial block of the image, making full use of the static and logical spatial redundancy; quantization: determine which information to choose to transmit under the condition of ensuring the minimum quality loss, so as to reduce the bit rate; variable length coding: use quantization and auxiliary The static redundancy of the symbol sequence composed of information is...

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Abstract

A video streaming format conversion method and device from MPEG-2 to AVS, which contains length change decoding unit, counter quantization unit, counter DCT conversion unit, mode mapping and motion vector conversion unit, integer conversion unit, quantization unit and length and code change unit, wherein the MPEG-2 code streaming inputted in length change decoding unit for decoding and outputting code streaming one of which outputted to length change coding unit, another outputted to length change coding unit through mode mapping and motion vector conversion unit, then outputting AVS code stream, said invention avoids complicate mode selection algorithm and realizes quick conversion of video streaming format from MPEG-2 to AVS.

Description

technical field [0001] The invention relates to the field of video transmission, in particular to a method for converting video data in MPEG-2 format into compressed video data in AVS format. Background technique [0002] MPEG is the abbreviation of Moving Picture Experts Group. In 1988, ISO / IEC (International Organization for Standard / International Electrotechnical Commission) established MPEG to formulate international standards for moving image compression, and released ISO / IEC1172 (MPEG -1). In 1990, ISO / IEC began to formulate the video compression standard of MPEG-2. Its design goal is the image quality of advanced industry standard and higher transmission rate. The transmission rate that MPEG-2 can provide is between 3-10Mbits / sec, and its resolution under the NTSC system can reach 720×486. MPEG-2 can also provide broadcast-level video and CD-level sound quality . MPEG-2 audio coding can provide left and right middle and two surround sound channels, as well as a sub...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/01H04N19/40
Inventor 张鹏黄庆明张远吕岩高文
Owner 联合信源数字音频技术(北京)有限公司
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