A Hybrid Digital-Analog Video Transmission Method for Antenna Heterogeneous Scenarios

Abstract

The invention relates to a mixed digital-analog video transmission method for an antenna isomerism scenario. The method comprises a video coding and sending process, and a video receiving and reconstruction process, wherein at a sending end, transmission of a digital part obtains diversity gain provided by a base station through space-time coding, and all terminal users with antenna isomerism can successfully decode the digital part; for an analog part, residuals of a digital coder undergo 3D-DCT conversion, and obtained analog coded signals are sent through spatial multiplexing; at a receiving end, for the digital part of signals, a digital reconstructed video is obtained through a decoder; and for the analog part of the signals, an analog reconstructed video is obtained through spatial multiplexing decoding and the linear minimum mean square estimation joint decoding algorithm if the receiving end is provided with two antennas, and video reconstruction is carried out with excessive antenna coefficients processed as noises if the receiving end is provided with one antenna. Compared with the prior art, the method provided by the invention has the advantage that seamless self-adaptation for multi-antenna video transmission is achieved.

Description

technical field The present invention relates to a video transmission technology, in particular to a hybrid digital-analog video transmission method used in a heterogeneous antenna scenario. Background technique In a wireless broadcasting scenario, a base station (Base Station, BS) is usually equipped with multiple antennas, and different end users may be equipped with different numbers of antennas. The current multi-antenna technology can only allow the receiving end to be designed according to the minimum number of receiving antennas, which makes it impossible for receiving devices with more antennas to obtain any performance gain. Although analog video transmission can solve the heterogeneity of signal-to-noise ratio, it cannot solve the heterogeneity of the number of antennas due to the limitation of space-time code. The performance of broadcast systems is usually bounded by worst-case scenarios to guarantee successful decoding for all users. The broadcast system is a...

AI Technical Summary

Problems solved by technology

Due to the removal of entropy coding, pseudo-analog transmission is slightly less efficient than traditional digital video transmission systems, and SoftCast does not perform well in poor channel conditions compared to other classic digital video coding schemes

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