Method and apparatus for transmitting coding result of video compression

Abstract

The present invention discloses a method for transmitting a compressed coding result of video, which comprises: a. setting a maximum capacity and a output threshold value of a First-In First-Out (FIFO) memorizer; b. receiving the input current frame data, compressing and coding the received data, inputting the coding result into the FIFO; every time the readable data capacity in FIFO arriving at the threshold value, controlling the output of the coding result data in FIFO; c. after accomplishing the coding of the current frame data, controlling the output of the remnant coding result data in FIFO, returning to the step b until outputting all the frame coding data of the video. The present invention also discloses a device for transmitting a compressed coding result of video, which includes: a buffer unit, a coding unit, a FIFO and a transmission control unit. Application of the method and device disclosed in present invention can make full use of bus resources occurred in the vacant time between coding the data and outputting the data, and can save system resources occupied in whole coding and outputting process.

Description

technical field [0001] The invention relates to a video signal transmission technology, in particular to a method and device for real-time transmission of video compression coding results. Background technique [0002] At present, when performing end-to-end transmission of video images, in order to save bandwidth resources required for transmission, it is usually necessary to compress and encode the transmitted video images. The current video coding algorithm is usually carried out in units of macroblocks. During the coding process, the current frame is first input into the cache unit line by line. When the basic data volume that can be coded is reached, the coding unit takes out the original video data from the cache unit. Encoding is performed in units of macroblocks, and after the encoding of each macroblock is completed, the encoding result is stored in a preset storage unit. After the data encoding of the current frame is completed, the external data channel is trigger...

AI Technical Summary

Problems solved by technology

Overall, the total time spent on compression encoding and transmission of one frame is shown in Figure 2

[0004] It can be seen intuitively from Fig. 2 that in the above-mentioned encoding result transmission mode, there is no data transmission on the bus during the absolute idle time, and in addition, the bus is also idle during the relatively idle time (not shown in Fig. 2 ). State, the idle time of the bus during these idle times causes a great waste of system resources, and consumes a lot of non-encoding time between adjacent frame encoding, which negatively affects the frame rate control capability

In addition, when the compressed video frame size is smaller, the absolute idle time will be longer and the resource waste will be greater

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