Video signal conversion coding system with adaptive image rate reducing

A transcoding and adaptable technology, applied in the field of video transcoding, can solve the problem of inability to reduce the frame rate of video data, and achieve the effect of omitting the amount of calculation, fast processing, and speeding up the transcoding process

Inactive Publication Date: 2007-02-14
INSTITUTE FOR INFORMATION INDUSTRY
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Problems solved by technology

However, this known technology only performs frame rate conversion coding for I and P image types, and cannot completely reduce frame rate conversion coding for video data of common I, P, and B image types, so it cannot perform frame rate reduction completely and quickly. Therefore, the design of the known video conversion coding still has many shortcomings and needs to be improved.

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  • Video signal conversion coding system with adaptive image rate reducing
  • Video signal conversion coding system with adaptive image rate reducing
  • Video signal conversion coding system with adaptive image rate reducing

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Embodiment Construction

[0028] image 3 A block diagram showing an adaptive reduced frame rate video transcoding system of the present invention, the system includes a first inverse quantization device 305, a switching device 310, a variable length decoder 315, a discrete cosine transform device 320, a moving Vector compensation device 325, a storage device 330, a quantization device 335, a second inverse quantization device 340, an inverse discrete cosine transform device 345, and a variable length encoding device 350, the system is more known in series video conversion Encoding frameworks (such as figure 1 Shown) simplified, eliminating the need for an inverse discrete cosine transform device.

[0029] When the adaptive frame rate video conversion coding system of the present invention receives and transmits dynamic image compression data, it directly performs bit-length decoding to convert the one-dimensional data into a two-dimensional matrix, and then dequantizes the data by the first The devi...

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Abstract

This invention provides a picture ratio reduced video conversion coding system for converting audio-video information stream of video group structure composed of plurality of great collection area blocks, said system contains a switching device, a length variable decoder, a move vector compensator, a memory and a coding / decoding device wherein the move vector compensator can respectively calculate the move vector of great collection block to avoid not making complete picture ratio reduced conversion coding to normal I, P and B video image type video information by public known technology, to process completely and quickly video information code conversion with saving calculation work and speeding up code conversion process.

Description

technical field [0001] The invention relates to the technology of video conversion coding, especially a video conversion coding system for adaptively reducing frame rate. Background technique [0002] Generally, when transmitting a video and audio data stream, due to the limitation of network bandwidth, it is often necessary to perform video transcoding (video trasncoding) on ​​the video and audio data stream to convert it into a video and audio data stream with a reduced frame-rate (reduced frame-rate) , for transmission over a congested network. That is to say, in video conversion coding, the number of frames per second (frame-rate) of dynamic image compression data is often reduced to another dynamic image compression data, that is, the frame rate is reduced to reduce the bit rate of the data. (bit-rate), in order to meet the demand of video transmission with insufficient bandwidth. [0003] figure 1 It is a block diagram of a video transcoder system (video transcoder)...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/30H04N19/124H04N19/40H04N19/51H04N19/625
Inventor 李维仁何文桢
Owner INSTITUTE FOR INFORMATION INDUSTRY
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