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H.264/AVC high-efficiency transcoder based on fast mode judgment

A determinator and mode technology, applied in the field of network communication, can solve the problems of high resource occupancy such as computing/storage, inability to meet the requirements of real-time video transcoding, and high equipment cost, reducing the amount of computation and simplifying the motion vector The effect of searching and macroblock mode decision, reducing the operational complexity and time of transcoding

Inactive Publication Date: 2010-12-08
XIDIAN UNIV
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Problems solved by technology

When this technical solution is implemented, it is necessary to completely decode the input code stream, and then perform encoding operations such as motion estimation and encoding mode judgment on the decoded image again. The computational complexity is high and cannot meet the requirements of real-time video transcoding. In the actual video communication system High occupancy rate of resources such as computing / storage, resulting in high equipment costs and difficulties in practical promotion and application

Method used

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  • H.264/AVC high-efficiency transcoder based on fast mode judgment
  • H.264/AVC high-efficiency transcoder based on fast mode judgment
  • H.264/AVC high-efficiency transcoder based on fast mode judgment

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Embodiment Construction

[0031] refer to figure 2 , the H.264 / AVC high-rate transcoding system based on fast mode decision of the present invention is composed of three parts: a decoder, a fast mode decision device and an encoder. in:

[0032] Decoder: It is used to decode the input H.264 / AVC compressed video stream, and transmit the macroblock mode information and motion information to the fast mode judger, and at the same time transmit the decoded image to the encoder. The decoder is mainly composed of five units: variable length decoder, inverse quantization, inverse transformation, motion compensation and reference frame. Among them, the three units of variable length decoder, inverse quantization and inverse transformation are used to calculate the residual image and decoding information, and the two units of motion compensation and reference frame are used to generate the predicted image. The predicted image and the residual image are added to obtain the decoded image.

[0033] Fast mode dec...

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Abstract

The invention discloses an H.264 / AVC high-efficiency transcoder based on fast mode judgment, belonging to the technical field of network communication, and mainly solving the defects of high computation complexity and bad instantaneity in the existing transcoding method. The transcoder consists of a decoder, a fast mode judger and a coder. The decoder transmits a macro block mode, a motion vector and a residual image to the fast mode judger and transmits a decoded frame image to the coder; the fast mode judger fast judges the mode of the decoded frame image to obtain a new macro block mode according to the information transmitted by the decoder and a reference frame image transmitted by the coder, and transmits the new macro block mode to the coder; and the coder codes the decoding frame image transmitted by he decoder according to the information which is transmitted by the fast mode judger to obtain the established code stream of target bitrate. The H.264 / AVC high-efficiency transcoder greatly reduces the transcoding computation complexity, reduces the transcoding time, and can be used for immediately transmitting the multi-media data and the other data.

Description

technical field [0001] The invention belongs to the technical field of network communication, relates to a fast code rate transcoding method in the H.264 / AVC (advanced video coding) standard, and can be used for real-time multimedia transmission and other data transmission. Background technique [0002] With the continuous development of mobile communication technology, the rapid increase of network access speed, the increasing intelligence of mobile terminals, and the increasing optimization of digital compression technology, mobile terminals have developed from simple communication and contact tools to a multimedia intelligent platform. At the same time, traditional value-added services such as MMS and picture and ring download can no longer meet the needs of users. The emergence of mobile streaming media will change this situation, it can provide users with services including video on demand, mobile video chat, mobile video surveillance and so on. Mobile streaming media ...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50H04N19/40
Inventor 秦浩刘海啸宋彬古立峰
Owner XIDIAN UNIV
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