Design Of Video Data Processing Circuit For Transmitter Based On HDMI1.3

With development in display technology, upgrading signal interface standard has been promoted. For household electrical appliances, signal interface standard has been upgraded from the original composite video port, S-Video interface, component YPbPr interface, DVI interface to the high definition multimedia interface (HDMI), which are adapted to meet the requirements of improving the clarity of the video signal and implementing high-speed digital signal communication. As the digital high definition television based on ATSC and DVB-T mode are widely broadcast, more and more digital multimedia devices will be introduced. It is difficult to us the traditional interface standards to transmit high definition digital video data. HDMI standard, which is based on TMDS technology, is a newly established interface standard that can meet the needs of digital video communication. HDMI standard is compatible well with DVI and they can be interconnected each other.Based on introducing the background of developing HDMI standard, this dissertation describes the technical advantages of HDMI 1.3 standard, compared to the others, including high communication speed and deep color mode support. The basic principle and structure of HDMI interface are analyzed. All the functional modules that are used to design the video data transmitter based on HDMI1.3 are introduced and designed. The dissertation focuses on design and simulation for the HDMI1.3 digital video data processing hardware circuit in transmitter. The design consists of mainly video capturing and video processing. The circuits that implement the extraction of embedded control signals (data enable signal, horizontal and vertical synchronous signals), color space conversion (YCbCr to RGB), dithering treatment of video data. Unified with the audio processing module and transmission control modules of the HDMI1.3 video data transmitter, our design is simulated and synthesized by professional EDA tools. Static timing analysis and automatic placement and routing for the video processing circuit are also implemented. The test result shows that the circuit performance is up to the mustard.