Multi-point video hierarchical encoding and decoding method and transmission device

Abstract

The invention relates to the field of video encoding and decoding, in particular to a multi-point video hierarchical encoding and decoding method and a transmission device, comprising the following steps: encoding equipment encodes K frames in an intra-frame encoding mode and takes the K frames as a base layer of the K frames; performing wavelet transformation on the K frame to obtain an LL sub-band, an LH sub-band, an HL sub-band and an HH sub-band corresponding to the K frame, wherein the LL sub-band and the HH sub-band are used as a first enhancement layer of the K frame, the LH sub-band isused as a second enhancement layer of the K frame, and the HL sub-band is used as a third enhancement layer of the K frame; performing wavelet transformation on the WZ frame to obtain an LL sub-band,an LH sub-band, an HL sub-band and an HH sub-band corresponding to the WZ frame, and performing coding by taking the LL sub-band as a base layer of the WZ frame, the LH sub-band as a first enhancement layer of the WZ frame, the HH sub-band as a second enhancement layer of the WZ frame and the HL sub-band; and sending to decoding equipment for decoding. According to the invention, the complexity of encoding equipment and decoding equipment is reduced, and low time delay and low energy consumption of transmission are realized.

Description

technical field [0001] The invention relates to the field of video transmission, in particular to a multipoint video hierarchical encoding and decoding method and a multipoint video hierarchical encoding and decoding transmission device. Background technique [0002] In the current heterogeneous network for mobile terminals, when the wireless bandwidth is insufficient (that is, the quality of the wireless network is poor), the quality of the video received by the mobile terminal is poor; when the bandwidth of the wireless network is rich (that is, the quality of the wireless network is good) In the case of , the video quality received by the mobile terminal is high. In order to solve this problem, a hierarchical coding method has been proposed at present. [0003] After the coding device encodes the video data hierarchically, the output code stream generally has a base layer and multiple enhancement layers, and the decoding device can recover meaningful image or video infor...

AI Technical Summary

Problems solved by technology

Since the SHVC system adopts the inter-layer prediction technology, the complexity of its encoding equipment is very high, and the corresponding decoding equipment is also highly complex. Therefore, it is urgent to propose a coding and decoding method with low complexity of encoding equipment and decoding equipment.

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