# US 8,789,127 B2 · Communication system, transmission apparatus, transmission method, reception apparatus and reception method

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- Number: US 8,789,127 B2
- Document ID: US8789127B2
- Status: Granted
- Kind: B2
- Application number: 13/652,942
- Filed: 2012-10-16
- Published: 2013-02-14
- Granted: 2014-07-22
- Earliest claimed: 2007-03-13
- Assignees: Sony Corporation
- Applicants: Sony Corporation
- Inventors: Toshihide Hayashi; Masayuki Tsumura; Koki Tsumori; Katsuhiro Shimizu; Ban Kawamura
- Web page: https://patentgrep.com/patent/US8789127B2

## CPC

- H04N 7/083: with signal insertion during the vertical and the horizontal blanking interval {, e.g. MAC data signals}
- G09G 5/005: {Adapting incoming signals to the display format of the display terminal}
- G09G 5/006: {Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04)}
- H04L 12/2805: {Home Audio Video Interoperability [HAVI] networks}
- H04N 5/38: Transmitter circuitry {for the transmission of television signals according to analogue transmission standards} (H04N5/14 takes precedence)
- H04N 5/76: Television signal recording
- H04N 5/765: Interface circuits between an apparatus for recording and another apparatus
- H04N 5/775: between a recording apparatus and a television receiver
- H04N 5/85: on discs or drums
- H04N 7/0125: {one of the standards being a high definition standard}
- H04N 21/43632: {involving a wired protocol, e.g. IEEE 1394 (high-speed IEEE 1394 serial bus H04L12/40052)}
- H04N 21/43635: {HDMI}
- G09G 2370/12: Use of DVI or HDMI protocol in interfaces along the display data pipeline
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

An AV system composed of an HD recorder and a display unit uses a communication interface of the HDMI. An HDMI source of the HD recorder transmits image data (image signal) in the form of differential signals to an HDMI sink of the display unit through three TMDS channels. The HDMI source inserts content identification information for the identification of the type of a content of image data to be transmitted into an AVI InfoFrame packet placed in a blanking period. A control section of the display unit controls operation of a display processing section which carries out a process for displaying for the image data based on the content identification information received by the HDMI sink and a display section for displaying an image.

## Claims

### Claim 1

A transmission apparatus, comprising:
an identification information insertion section configured to insert, into a blanking period of an image signal of a predetermined content to be transmitted, content identification information for the identification of a type of the predetermined content; and
a transmission section configured to transmit the image signal having the content identification information inserted in the blanking period thereof by said identification information insertion section in the form of differential signals through a plurality of channels,
wherein said identification information insertion section inserts content identification information for the identification of the type of the content into a blanking period of the image signal of the predetermined content to be transmitted using the AVI InfoFrame of the HDMI.

### Claim 2

A transmission apparatus, comprising:
an identification information insertion section configured to insert, into a blanking period of an image signal of a predetermined content to be transmitted, content identification information for the identification of a type of the predetermined content;
a transmission section configured to transmit the image signal having the content identification information inserted in the blanking period thereof by said identification information insertion section in the form of differential signals through a plurality of channels; and
a color space information insertion section configured to insert color space information of the image signal into a blanking period of the image signal of the predetermined content to be transmitted,
wherein the definition of the color space information varies in response to a type of the content indicated by the content identification information, and
the definition of the color space information varies at least depending upon whether or not the predetermined content is a still picture.

### Claim 3

A transmission apparatus, comprising:
an identification information insertion section configured to insert, into a blanking period of an image signal of a predetermined content to be transmitted, content identification information for the identification of a type of the predetermined content;
a transmission section configured to transmit the image signal having the content identification information inserted in the blanking period thereof by said identification information insertion section in the form of differential signals through a plurality of channels; and
a quantization range information insertion section configured to insert quantization range information of the image signal into a blanking period of the image signal of the content to be transmitted,
wherein the definition of the quantization range information varies depending upon the type of the predetermined content indicated by the content identification information, and
the definition of the quantization range information varies at least depending upon whether or not the predetermined content is a still picture.