A video signal transmission method based on power line

Abstract

The invention discloses a video signal transmission method based on a power line, wherein the method can transmit video signals by using the power line. The method uses digital coding to obtain the best coding efficiency and uses analog coding to achieve gentle video quality change; through the hybrid digital and analog coding methods and the effective combination of the advantages of the two methods, power margin in digital coded modulation is used to transmit information related to an enhancement layer, so that the power utilization is improved and meanwhile the reconstruction quality of video transmission is enhanced; according to the channel condition, a target information rate is dynamically adjusted to ensure the all-weather communication reachability; under the same bandwidth condition, the transmission of different information rates is realized dynamically, the use of the bandwidth is maximized, and the communication rate and the success rate are guaranteed; and besides, in a video data decoding processes, by creating an ION shared memory and using a private handle structure object to directly access video decoding data in a receiving end window buffer, the pressure of a CPU is reduced and the efficiency of video signal transmission is improved.

Description

technical field [0001] The invention relates to power carrier communication technology, in particular to a power line-based video signal transmission method. Background technique [0002] At present, the use of electricity has spread to thousands of households, but how to realize the intelligent management of household electricity is a problem that government departments and related manufacturers need to consider. It is a good idea and way to solve this problem through the Internet of Things, but the current research on the smart power Internet of Things system is still in the initial stage of development, and there are few studies. [0003] Power carrier is a unique communication method for power systems. Power line communication (PLC) refers to the technology of using existing power lines to transmit analog or digital signals at high speed through carrier waves. In recent years, Broadband Power Line Carrier Communication (BPLC: Broadband Power Line Carrier) technology has...

AI Technical Summary

Problems solved by technology

It is a good idea and way to solve this problem through the Internet of Things, but the current research on the smart power Internet of Things system is still in the initial stage of development, and there are few studies

However, this optimal performance has a premise. First, the channel quality must be estimated very accurately; once the code rate of the source digital code is determined, if the channel quality changes, the channel will become better, and the improved channel quality cannot be used. If the channel quality becomes worse and reaches a critical point, the entire video quality will have a cliff effect.

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