# US 8,786,779 B2 · Signal processing apparatus and method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,786,779 B2 - Document ID: US8786779B2 - Status: Granted - Kind: B2 - Application number: 13/477,769 - Filed: 2012-05-22 - Published: 2012-09-13 - Granted: 2014-07-22 - Earliest claimed: 2007-11-27 - Assignees: Canon Kabushiki Kaisha - Applicants: Noriaki Suzuki - Inventors: Noriaki Suzuki - Web page: https://patentgrep.com/patent/US8786779B2 ## CPC - H04N 5/04: Synchronising (for television systems using pulse code modulation H04N7/56) - H04N 21/2368: Multiplexing of audio and video streams - H04N 21/43072: {of multiple content streams on the same device} - H04N 21/4341: {Demultiplexing of audio and video streams} - H04N 21/439: Processing of audio elementary streams - H04N 21/4622: {Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet (web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859)} - H04N 21/4852: {for modifying audio parameters, e.g. switching between mono and stereo} - H04N 21/4854: {for modifying image parameters, e.g. image brightness, contrast} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A video audio system includes an audio processing apparatus capable of processing audio signals input from a plurality of input sources and a video processing apparatus capable of displaying a video image based on a video signal input from a selected input source. The video processing apparatus executes image processing based on the selected input source type notified by the audio processing apparatus, and transmits delay time information required for the image processing. The audio processing apparatus delays an audio signal based on the delay time information transmitted from the video processing apparatus. ## Claims ### Claim 1 A signal processing apparatus connectable to a display apparatus and connectable to a plurality of input source devices, the signal processing apparatus having an audio processing unit, and comprising: a selection unit configured to select an input source device from the plurality of input source devices connected to the signal processing apparatus in accordance with a user's selecting instruction in a case where the plurality of input source devices are connected to the signal processing apparatus; a transmission unit configured to transmit a device type of the selected input source device to the display apparatus; a receiving unit configured to receive, from the display apparatus, information concerning delay time for displaying a video based on a video signal output from the selected input source device, the delay time being set according to the device type of the selected input source device; a delay unit configured to delay an audio signal input from the selected input source device based on the information received by the receiving unit; and an output unit configured to output the audio signal delayed by the delay unit, wherein the selection unit is configured to automatically select a connected input device in response to the power of the signal processing apparatus being turned on in a case where only one input source device is connected to the signal processing apparatus. ### Claim 2 (depends on 1) The signal processing apparatus according to claim 1, wherein said device type information includes at least information indicating a digital versatile disc (DVD) player and a game console. ### Claim 3 (depends on 2) The signal processing apparatus according to claim 2, wherein delay time corresponding to the digital versatile disc (DVD) player is longer than delay time corresponding to the game console. ### Claim 4 (depends on 1) The signal processing apparatus according to claim 1, wherein the signal processing apparatus is connected by HDMI (High Definition Multimedia Interface) connection, and the signal processing apparatus is connectable to the plurality of input source devices by HDMI connection. ### Claim 5 A system comprising a signal processing apparatus and a display apparatus connected to the signal processing apparatus, the signal processing apparatus being connectable to a plurality of input source devices and having an audio processing unit, the signal processing apparatus comprising: a selection unit configured to select an input source device from the plurality of input source devices connected to the signal processing apparatus in accordance with a user's selecting instruction in a case where the plurality of input source devices are connected to the signal processing apparatus; a transmission unit configured to transmit a device type of the selected input source device to the display apparatus; a receiving unit configured to receive, from the display apparatus, information concerning delay time for displaying a video based on a video signal output from the selected input source device, the delay time being set according to the device type of the selected input source device; a delay unit configured to delay an audio signal input from the selected input source device based on the information received by the receiving unit; and an output unit configured to output the audio signal delayed by the delay unit, wherein the selection unit is configured to automatically select a connected input device in response to the power of the signal processing apparatus being turned on in a case where only one input source device is connected to the signal processing apparatus. ### Claim 6 A method for controlling a signal processing apparatus connectable to a display apparatus and connectable to a plurality of input source devices, the signal processing apparatus having an audio processing unit, the method comprising: selecting an input source device from the plurality of input source devices connected to the signal processing apparatus in accordance with a user's selecting instruction in a case where the plurality of input source devices are connected to the signal processing apparatus; transmitting a device type of the selected input source device to the display apparatus; receiving, from the display apparatus, information concerning delay time for displaying a video based on a video signal input from the selected input source device, the delay time being set according to the device type of the selected input source device; delaying an audio signal input from the selected input source device based on the received information; and outputting the delayed audio signal, wherein the selecting includes automatically selecting a connected input device in response to the power of the signal processing apparatus being turned on in a case where only one input source device is connected to the signal processing apparatus. ### Claim 7 (depends on 6) The method according to claim 6, wherein said device type information includes at least information indicating a digital versatile disc (DVD) player and a game console. ### Claim 8 (depends on 7) The method according to claim 7, wherein delay time corresponding to the digital versatile disc (DVD) player is longer than delay time corresponding to the game console. ### Claim 9 (depends on 6) The method according to claim 6, wherein the signal processing apparatus is connected by HDMI (High Definition Multimedia Interface) connection, and the signal processing apparatus is connectable to the plurality of input source devices by HDMI connection. ### Claim 10 (depends on 1) The signal processing apparatus according to claim 1, wherein the signal processing apparatus receives the video signal from the selected input source device and outputs the video signal to the display apparatus. ### Claim 11 (depends on 6) The method according to claim 6, wherein the signal processing apparatus receives the video signal from the selected input source device and outputs the video signal to the display apparatus.