# US 2009/0024767 A1 · Signal Input System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2009/0024767 A1 - Document ID: US20090024767A1 - Status: Published application - Kind: A1 - Application number: 12/121,058 - Filed: 2008-05-15 - Published: 2009-01-22 - Earliest claimed: 2007-05-18 - Assignees: Funai Electric Co., Ltd. - Inventors: Syuhei MATSUDA - Web page: https://patentgrep.com/patent/US20090024767A1 ## CPC - H04N 5/76: Television signal recording - 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)} - H04N 5/775: between a recording apparatus and a television receiver - H04N 21/436: Interfacing a local distribution network, e.g. communicating with another STB {or one or more peripheral devices} inside the home - G09G 2370/047: using display data channel standard [DDC] communication - G09G 2370/12: Use of DVI or HDMI protocol in interfaces along the display data pipeline - H04N 5/85: on discs or drums - 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) ## Abstract Disclosed is a signal input system to input an image signal from source equipment to sink equipment through a High Definition Multimedia Interface, wherein the source equipment comprises a transmission section to transmit a format signal to the sink equipment through a predetermined first line in the High Definition Multimedia Interface, the format signal having a voltage value corresponding to a format of the image signal and the sink equipment comprises: a reception section to receive the format signal transmitted through the first line by the transmission section; a judging section to judge the format of the image signal based on the voltage value of the format signal which is received by the reception section; and a setting section to set an image output based on a judgment result of the judging section. ## Claims ### Claim 1 A signal input system to input an image signal from source equipment to sink equipment through a High Definition Multimedia Interface, wherein the source equipment comprises a transmission section to transmit a format signal to the sink equipment through a predetermined first line in the High Definition Multimedia Interface, the format signal having a voltage value corresponding to a format of the image signal and the sink equipment comprises: a reception section to receive the format signal transmitted through the first line by the transmission section; a judging section to judge the format of the image signal based on the voltage value of the format signal which is received by the reception section; and a setting section to set an image output based on a judgment result of the judging section. ### Claim 2 (depends on 1) The signal input system according to claim 1, wherein the first line is a line to perform a transmission and a reception of a hot plug signal which indicates that the source equipment and the sink equipment are connected to each other, and the format signal has a function as the hot plug signal. ### Claim 3 (depends on 1) The signal input system according to claim 1, wherein the source equipment comprises a second transmission section to transmit a second format signal to the sink equipment through a predetermined second line in the High Definition Multimedia Interface, the second format signal having a voltage value corresponding to a format of a sound signal, and the sink equipment comprises: a second reception section to receive the second format signal transmitted through the second line by the second transmission section; a second judging section to judge the format of the sound signal based on the voltage value of the second format signal which is received by the second reception section; and a second setting section to set a sound output based on a judgment result of the second judging section. ### Claim 4 A signal input system to input an image signal and a sound signal from source equipment to sink equipment through a High Definition Multimedia Interface, wherein the source equipment comprises: a first transmission section to transmit a first format signal to the sink equipment through a predetermined first line in the High Definition Multimedia Interface, the first format signal having a voltage value corresponding to a format of the image signal; and a second transmission section to transmit a second format signal to the sink equipment through a predetermined second line in the High Definition Multimedia Interface, the second format signal having a voltage value corresponding to a format of the sound signal, and the sink equipment comprises: a first reception section to receive the first format signal transmitted through the first line by the first transmission section; a second reception section to receive the second format signal transmitted through the second line by the second transmission section; a first judging section to judge the format of the image signal based on the voltage value of the first format signal which is received by the first reception section; a second judging section to judge the format of the sound signal based on the voltage value of the second format signal which is received by the second reception section; a first setting section to set an image output based on a judgment result of the first judging section; and a second setting section to set a sound output based on a judgment result of the second judging section, and wherein the first line is a line to perform a transmission and a reception of a hot plug signal which indicates that the source equipment and the sink equipment are connected to each other, and either one of the first format signal and the second format signal has a function as the hot plug signal.