Transmission system, transmission apparatus, and transmission method for transmitting video data

• US 8,982,279 B2
• Filed: 07/15/2014
• Issued: 03/17/2015
• Est. Priority Date: 05/16/2006
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Suzuki, Kazuyoshi, Matsuura, Katsuji
• Primary Examiner(s): Lee, Michael
• Application Number:
  US14/332,067
• Publication Number:
  US 20140327827A1
• Time in Patent Office: 245 Days
• Field of Search: 348553-558, 348469-478, 348/705, 348/706, 37524001-24029, 375/260, 375/259
• US Class Current: 348/478
• CPC Class Codes: G09G 2340/10 Mixing of images, i.e. displayed pixel being the result of an operation, e.g. adding, on the corresponding input pixels
• CPC Class Codes: G09G 2340/12 Overlay of images, i.e. displayed pixel being the result of switching between the corresponding input pixels
• CPC Class Codes: G09G 2370/047 using display data channel standard [DDC] communication
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 5/04 Synchronising for television systems using pulse code modulation H04N7/56
• CPC Class Codes: H04N 7/015 High-definition television systems
• CPC Class Codes: H04N 7/035 Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal
• CPC Class Codes: H04N 7/0803 using frequency interleaving, e.g. with precision offset
• CPC Class Codes: H04N 7/081 the additional information signals being transmitted by means of a subcarrier
• CPC Class Codes: H04N 7/083 with signal insertion during the vertical and the horizontal blanking interval , e.g. MAC data signals
• CPC Class Codes: H04N 7/087 with signal insertion during the vertical blanking interval only
• CPC Class Codes: H04N 7/088 the inserted signal being digital
• CPC Class Codes: H04N 7/10 Adaptations for transmission by electrical cable H04N7/12 takes precedence

Abstract

An HDMI® source determines whether or not an HDMI® sink can receive a sub-signal based on VSDB of E-EDID. When the HDMI® sink can receive the sub-signal, the HDMI® source adds a sub-signal to pixel data of a main image composed of pixel data whose number of bits is smaller than that of transmission pixel data transmitted by a transmitter, thereby constructing transmission pixel data. This data is transmitted by the transmitter through TMDS channels #0 to #2. Furthermore, the HDMI® source transmits a general control packet containing sub-signal information indicating whether or not the sub-signal is contained in the transmission pixel data in the control period of a vertical blanking period. The present invention can be applied to, for example, HDMI®.

Claims

1. A transmission apparatus for transmitting 24 bit pixel data of an uncompressed image for one screen in one direction to a receiving apparatus by using a differential signal transmitted via a plurality of transition minimized differential signaling (TMDS) channels, the TMDS channels being operable to transmit data of a fixed number of bits per clock transition of a pixel clock in a valid image period, the valid image period being a period between sequential vertical synchronization signals and not including a horizontal blanking period and a vertical blanking period, the transmission apparatus comprising:

a receiving unit that, via a display data channel (DDC) line, receives high resolution image data related information which indicates whether or not the receiving apparatus supports a high resolution image having pixel data greater than 24 bit;

a determination unit that determines whether or not the receiving apparatus supports a high resolution image based on the high resolution image data related information;

a reproduction unit that reproduces high resolution image data; and

a transmitting unit that transmits the high resolution image data, supplied from the reproduction unit, in one direction to the receiving apparatus by using a differential signal transmitted via the plurality of TMDS channels in the valid image period, raising a frequency of the pixel clock, and inserting a color depth (CD) bit, which is related to a bit number of the high resolution image data, into a general control packet, the general control packet being transmitted during a data island period of the high resolution image data, in one direction, to the receiving apparatus,

wherein the transmitting unit, after raising the frequency of the pixel clock, transmits one pixel data of the high resolution image data in two pixel clock transitions.

2. A transmission method for transmitting 24 bit pixel data of an uncompressed image for one screen in one direction to a receiving apparatus by using a differential signal transmitted via a plurality of transition minimized differential signaling (TMDS) channels, the TMDS channels being operable to transmit data of a fixed number of bits per clock transition of a pixel clock in a valid image period, the valid image period being a period between sequential vertical synchronization signals and not including a horizontal blanking period and a vertical blanking period, the transmission method comprising:

receiving, via a display data channel (DDC) line, high resolution image data related information which indicates whether or not the receiving apparatus supports a high resolution image having pixel data of greater than 24 bit;

determining whether or not the receiving apparatus supports a high resolution image based on the high resolution image data related information;

reproducing high resolution image data; and

transmitting the high resolution image data, supplied from the reproducing, in one direction to the receiving apparatus by using a differential signal transmitted via the plurality of TMDS channels in the valid image period, raising a frequency of the pixel clock, and inserting a color depth (CD) bit, which is related to a bit number of the high resolution image data, into a general control packet, the general control packet being transmitted during a data island period of the high resolution image data, in one direction, to the receiving apparatus,

wherein during the transmitting step, after raising the frequency of the pixel clock, one pixel data of the high resolution image data is transmitted in two pixel clock transitions.