CEC (Consumer Electronics Control) processing device for high-definition sound and video equipment

Abstract

The invention relates to a CEC (Consumer Electronics Control) processing scheme for high-definition sound and video equipment. The CEC processing scheme comprises a decoding board, a power supply board, a power amplifier board, and a main control board for controlling the decoding board, the power supply board and the power amplifying board, wherein the decoding board is provided with a central processing chip, and an HDMI (High-Definition Multimedia Interface) which is connected with the central processing chip; the HDMI interface is provided with a CEC pin; the CEC pin of the HDMI is connected with the central processing chip and a microcontroller of the main control board through connecting circuits; when the high-definition sound and video equipment works normally, the central processing chip is used for controlling the CEC pin of the HDMI; and when the high-definition sound and video equipment is in a standby state, the microcontroller is used for controlling the CEC pin of the HDMI. In the high-definition sound and video equipment, the control power of CEC is distributed properly and the connecting circuits are arranged, so that the effect of the power consumption of the entire equipment being less than 0.5W is realized and the HDMICEC requirement is met effectively; a special MCU (Microprogrammed Control Unit) with a CEC function is not required to be selected additionally, so that the cost can be controlled effectively; and the method is a high-cost-performance solution.

Description

technical field [0001] The invention relates to multimedia high-definition audio-visual equipment, in particular to a CEC processing device for high-definition audio-visual equipment. Background technique [0002] With the widespread use of flat panel TVs and high-definition audio-visual equipment, HDMI (High-Definition Multimedia Interface) interfaces are becoming more and more popular. HDMI CEC (Consumer Electronics Control, a protocol that provides advanced control functions for home audio-visual equipment connected through HDMI cables, users can control these devices connected through HDMI cables with a remote control.) The application requirements have also become wider. At the same time, with the promulgation of local laws and regulations, the requirements for energy saving are becoming more and more stringent. For example, the European ERP standard has been upgraded to 2.0, which has higher requirements for product standby power consumption: standby power consumption...

AI Technical Summary

Problems solved by technology

In this way, a problem arises: when the product adds HDMI CEC (including standby CEC) function, it must meet the requirement that the standby power consumption of the whole machine is less than 0.5W.

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