Compressed encoding control circuit and control method of compressed encoding

Abstract

The invention discloses a control circuit and a control method for compression coding. The invention sets a batch processing control unit between a central processing unit and a processing unit of compression coding; the batch processing control unit assists the processing unit of compression coding to conduct batch processing for compression coding of a plurality of frames; thus the processing unit of compression coding requires no communication interruption from the central processing unit, and the time interval of a plurality of frames which are processed in batches does not include the waiting latency of response interruption of the central processing unit; besides, after the processing unit finishes the processing of compression coding for a plurality of fames, a communication interruption is conducted between the batch processing control unit and the central processor; therefore, the frequency of communication interruption between the central processing unit and the batch processing control unit is relatively low, thereby increasing the frame rate of video stream from compression coding.

Description

technical field [0001] The invention relates to video coding technology, in particular to a compression coding control circuit and a compression coding control method based on the 4th generation Motion Picture Experts Group (MPEG4) standard. Background technique [0002] In the real-time digital video stream, the compression encoding processing unit is usually used to perform compression encoding based on the MPEG4 standard for each frame in the video stream, and the central processing unit is used for auxiliary scheduling to realize the control of compression encoding. [0003] FIG. 1 is a schematic structural diagram of an existing compression coding control circuit. As shown in Figure 1, the circuit includes: a central processing unit and a compression encoding processing unit. [0004] After the central processing unit sends a command for starting a frame of compression coding to the compression coding processing unit to start the compression coding of the current frame...

AI Technical Summary

Problems solved by technology

[0011] It can be seen that in the existing compression encoding control circuit, after each frame of compression encoding processing is completed, an interrupt communication is required between the compression encoding processing unit and the central processing unit, so that the compression encoding processing unit completes the compression encoding processing of one frame After that, it needs to wait for a certain time, and the waiting time is not necessarily the same each time, which increases the time interval between consecutive frames after compression processing, and the increased time interval is uncontrollable, thereby reducing the compression coding processing. The frame rate in the video stream may cause the video stream formed by the compressed and encoded frames of the compression encoding processing unit to fail to meet the requirements of real-time digital video streams

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