Error frame jumping method and device for wireless image communication system

Abstract

In the invention, while decoding the received image, deciding whether to use macro block as unit to sense error; if sensing error, executing error hiding; after extracting the zone with hiding error, deciding ratio to attention area and error severity; executing frame skip according to error severity. Thereby, it can pre-stop error cummulation effect, ensure image quality of attention zone, and obtain effect with improved image quality.

Description

【Technical field】 [0001] The present invention relates to a method and device for jumping error frames in a wireless image communication system with the following characteristics: a certain area is set as the user's attention area centered on the central part of the image, and the error generated in the attention area is used. The degree of error judges the severity of the error, and skips related images according to the severity of the error. 【Background technique】 [0002] In wireless image communication, the aspect that users are most dissatisfied with is the image mosaic phenomenon caused by data transmission errors. To solve this problem, unlike the method of checking and correcting errors on the network side, the method of actually correcting errors in the video codec of the playback image so that it can be played back almost identically to the original image is being used. Research. [0003] In fact, the most frequent error in image data is the error of VLC used for...

AI Technical Summary

Problems solved by technology

VLC has the following disadvantages: In terms of encoding characteristics, due to the continuity of the compressed data, it can also have an error effect on the subsequent data

[0008] However, in the above-mentioned existing methods, there is the following problem: if the degree of error generation is serious, then even if the error concealment method is used, it is unavoidable to accumulate errors on subsequent frames, and the image that is excessively performed error concealment is degraded. User trust in image quality

[0009] Moreover, there is a problem that since the compressed image itself is transmitted by VLC decoding, it is difficult to accurately judge the degree of error and the location of the error when an error occurs.

[0010] Also, there is a problem that since error concealment utilizes motion vectors from previous images or uses detection information about surrounding blocks where no errors have occurred, if the degree of error occurrence is serious, even the surrounding blocks where errors have occurred wrong, precise error concealment is more difficult, and error concealment is less effective

[0011] Furthermore, there is also the following problem: if the degree of error is high, errors are accumulated on the image to be decoded later because the error-concealed image itself includes a large number of errors, and the error-concealed image cannot be provided or Provide users with good image quality

Images