Method for converting coding of video image in conversion equipment

Abstract

The method includes following steps: a) receives the first video frame from the first network; b) the first video frame is decoded to the image with standard intermediate form, and labels an image decoded from I frame from these intermediate images; c) encodes the labeled image to a second video frame transmitted in the second network, and decodes the labeled image to be as the I frame. In step b, when buffering the decoded images, the label information relating to the decoded image is also buffered. In step c, before decoding the image, first reads out the relevant label information to confirm the image is the image decoded from I frame.

Description

technical field [0001] The invention relates to video coding technology, in particular to a conversion method for video image coding in a conversion device. Background technique [0002] With the maturity of 3G (The third Generation, third-generation mobile communication system) technology, the supported functions are becoming more and more perfect. In addition to the challenges of its own technology, 3G commercial networks will also face challenges in interoperability with other existing networks. question. Among the existing networks, the development of the packet network is particularly rapid, and the traditional network is gradually being replaced by the new packet network. It is currently a key point to realize the intercommunication between the 3G network and the existing packet network. Multimedia services are a bright spot of 3G, among which video services are the most well-known, currently commercial or pre-commercial 3G networks provide video services. At the sam...

AI Technical Summary

Problems solved by technology

[0015] The resulting problem is that the quality of the image restored by the B network terminal is degraded. The reason is that the I frame in the video frame is the reference frame of the image, and the subsequent P frames are all predicted according to the I frame, and the image obtained by decoding the P frame There is a certain error. Since the encoder and decoder work independently of each other, it cannot be guaranteed that the decoded image of the I frame is also encoded into an I frame when it is encoded in the B encoder. Since the number of P frames is much larger than that of I frames, the encoder chooses The decoded image of the P frame is more likely to be the coded I frame, so the obtained image reference is in error, resulting in the accumulation of subsequent image prediction errors, especially when the number of I frames is small, the image quality will become worse.

[0016] In short, due to the existence of conversion equipment, when converting from one codec to another codec, it is necessary to decode the received video frame first, and then encode it according to the required bandwidth and codec algorithm. The existing scheme This conversion method will inevitably cause some damage to the image quality and have a certain impact on the user's visual effect

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