Communication system, transmitter, receiver, communication method, program, and communication cable

摘要

The present invention relates to a communication system, a transmitter, a receiver, a communication method, a program, and a communication cable for providing high-speed bidirectional communication while maintaining compatibility. When an HDMI (R) source performs bidirectional IP communication with an HDMI (R) sink using a CEC line and a signal line, a switching control unit controls a switch so that, when data is transmitted, the switch selects a constituent signal forming a differential signal output from a converting unit and, when data is transmitted, the switch selects a constituent signal forming a differential signal output from a receiver. When bidirectional communication is performed using only the CEC line, the switching control unit controls the switch so that the CEC signal output from the HDMI (R) source or the receiver is selected. The present invention is applicable to, for example, HDMI (R).

主权项

1. A receiver for receiving, using a first differential signal, pixel data and audio data unidirectionally transmitted from a transmitter and, the pixel data being pixel data of an uncompressed image of one screen during an effective video period representing a period from one vertical synchronization signal to the next vertical synchronization signal excluding horizontal blanking intervals and a vertical blanking interval, the receiver comprising:
a signal transmitting unit configured to transmit, to the transmitter, a third differential signal representing transmission data different from the pixel data via differential transmission lines formed from a pair consisting of a first signal line and a second signal line; a signal receiving unit connected to the signal transmitting unit, the signal receiving unit receiving, from the transmitter, a second differential signal transmitted via the first signal line and the second signal line; and a subtracting circuit configured to subtract the third differential signal from the signal received by the signal receiving unit, the received pixel data and audio data corresponding to content, and the receiver being operable to display images so as to play back the content.