Title of Invention

"ACCESS TO AUDIO OUTPUT VIA CAPTURE SERVICE"

Abstract

ABSTRACT ACCESS TO AUDIO OUTPUT VIA CAPTURE SERVICE An operating system has an audio system service that can capture all of the streaming audio destined for an output device and make it available for processing. An application can perform the processing upon the captured streaming audio. Any streaming audio that is output by the application and destined for a render device can also be captured for signal processing prior to being mixed with other streaming audio destined for the output device. ID

Full Text

1 I I/We claim: 1. A computer implemented method comprising: generating a system audio stream for rendering to ambient (166, 186); capturing the system audio stream to be rendered to the ambient (166, 186); rendering the system audio stream to the ambient (166,186); capturing an ambient audio stream from the ambient (166, 186) including the rendered system audio stream; and i canceling the captured system audio stream from the captured ambient audio stream. 2. The computer implemented method as claimed in claim 1, wherein the rendering and each said capturing are performed by an operating system (156,176); and the canceling is performed by a real time communication application (RTC) (160,180) executed by one or more processors (362) being operated ^S by the operating system (156,176). 3. The computer implemented method as claimed in claim 1, wherein the canceling of the captiored system audio stream from the captured ambient audio stream is performed by an RTC (160,180). 4. The computer implemented method as claimed in claim 1, wherein the canceling of the captured system audio stream from the captured ambient audio 24 I I t stream is an acoustic echo cancellation process (AEC) (112) performed by an RTC (160, 180). 5. The computer implemented method as claimed in claim 1, wherein the captured ambient audio stream includes an audio stream that is not generated by a computing system; the canceling of the captured system audio stream from the captured ambient audio stream produces a resultant audio stream that includes the ^1^ audio stream that is not generated by the computing system; and the method frirther comprises transmitting the resultant audio stream. 6. The computer implemented method as claimed in claim 5, wherein the audio stream that is not generated by the computing system includes a vocal audio stream for transmission over a packet switched network (170) during the execution of an RTC (160,180). 7. The computer implemented method as claimed in claim 6, wherein the vocal audio stream for transmission over the packet switched network is a telephony audio ^ p stream 8. The computer implemented method as claimed in claim 1, wherein the system audio stream to be rendered to the ambient includes a plurality of audio streams generated by a plurality of applications. 9. The computer implemented method as claimed in claim 1, wherein 25 the rendering of the system sounds audio stream to the ambient (166,186) further comprises outputting the rendered system audio stream to a speaker (162, 182,262); and the capturing of the ambient audio stream from the ambient (166, 186) including the rendered system audio stream further comprises receiving the ambient audio stream into a microphone (164,184). 10. The computer implemented method as claimed in claim 1, wherein the ^f' method further comprising: capturing a transmitted audio stream; rendering the transmitted audio stream into the ambient (166,186); capturing the ambient audio stream including the rendering of the transmitted audio stream; and canceling the captured transmitted audio stream from the captured ambient audio stream. 11. The computer implemented method as claimed in claim 10, wherein ^ ^ the rendering and each said capturing are performed by an operating system (156, 176); and the canceling is performed by a real time communication application (RTC) (160, 180) executed by one or more processors (362) being operated by the operating system (156, 176). 26 I 1 12. The computer implemented method as claimed in claim 10, wherein the captured transmitted audio stream is received from a packet switched network. 13. The computer implemented method as claimed in claim 10, wherein the captured transmitted audio stream is a telephony audio stream that is received from a packet switched network. 14. The computer implemented method as claimed in claim 10, wherein the canceling of the captured transmitted audio stream from the captured ambient audio stream is performed by an RTC (160,180). | 15. The computer implemented method as claimed in claim 10, wherein the canceling of the captured transmitted audio stream from the captured ambient audio stream is an acoustic echo cancellation process (AEC) (112). 16. The computer implemented method as claimed in claim 1 or 10 fiirther comprising: capturing the transmitted audio stream that has been received at a communication network connection; ^% generating the system audio stream to be rendered to the ambient (166, 186,266); capturing the generated system audio stream to be rendered to the ambient (166, 186); rendering the fransmitted audio stream and the generated system audio stream into the ambient (166, 186); 27 capturing an ambient audio stream from the ambient and canceling therefrom: the rendering of the transmitted audio stream; and the rendering of the generated system audio stream. 17. The computer implemented method as claimed in claim 16, wherein the rendering and each said capturing are performed by an operating system (156, 176); and W the canceling is performed by an RTC (160, 180) executed by one or more processors (362) being operated by the operating system (156,176). 18. The computer implemented method as claimed in claim 16, wherein the captured ambient audio stream includes a vocal audio stream to be transmitted for real time communications; the canceling of the captured system audio stream from the captured ambient audio stream produces a resultant audio stream that includes the vocal audio stream; and ^ 1 the method further comprises transmitting the resultant audio stream. 19. The computer implemented method as claimed in claim 16, wherein the rendering of the generated system audio sfream to the ambient further comprises outputting the rendering of the generated system audio stream to a speaker (162, 182); and 28 the capttiring of the ambient audio stream from the ambient further comprises receiving the ambient audio stream into a microphone (164, 184). 20. A real time communication system comprising: a first client system executing a first RTC (160)and a first operating system (156), the first client system including: a first speaker (162); a first microphone (164); ^^ a first streaming audio capturer (SAC) (158); and a first streaming audio renderer (SAR) (158); a second client system executing a second RTC (180) and a second operating system (176), the second client system and including: a second speaker (182); a second microphone (184); a second streaming audio capturer (SAC) (178); and a second streaming audio renderer (SAR) (178); ^ g a packet switched network in communication with the first and second clients systems, wherein during execution of the first RTC (160 )and the second RTC (180)respectively by the first and second client systems: the first client system transmits a first voice audio stream over the packet switched network to the second client system that is captured 29 t 1 by the second SAC (178) and rendered by the second SAR (178) at the second speaker (182); the second client system transmits a second voice audio stream over the packet switched network to the first client system that is captured by the first SAC (158) and rendered by the first SAR (158)at the first speaker (164); a first system sounds audio stream is: ^•^ generated by an execution of a first system application by the first client system; captured by the first SAC (158); and rendered by the first SAR() at the first speaker; a second system sounds audio stream is: generated by an execution of the second operating system (176) by the second client system; captured by the second SAC; and ^ 3 rendered by the second SAR at the second speaker; the first microphone receives input, for capturing by the first SAC and communication therefrom to the first RTC(160), a first bulk audio stream that includes: the first system sounds audio stream; and a first ambient audio system from the ambient; 30 the second microphone receives input, for capturing by the second SAC and communication therefrom to the second RTC(180), a second bulk audio stream that includes: the second system sounds audio stream; and a second ambient audio system from the ambient; the first RTC (160) cancels from the first bulk audio stream: the first voice audio stream; and ^i^ the first system sounds audio stream; the second RTC (180) cancels from the second bulk audio stream: the second voice audio stream; and the second system audio stream. 21. The real time communication system as claimed in claim 19, wherein the first operating system (156) comprises: the RTC (160) outputs a voice audio stream received from the second system to the SAR that renders the same to the speaker (162) for an output ^ y that is input to the microphone (164); the operating system (156) outputs a system sounds audio stream to the SAR (158) that renders the same to the speaker (162) for an output that is input to the microphone (164); the microphone (164) receives an input of an ambient audio stream from the ambient (166) that includes: 31 the system sounds audio stream; and the voice audio stream received from the second system; theRTC(160): calls for the SAC to capture: a local audio stream that includes the voice audio stream received from the second system and rendered by the SAR; and ^ ' ^ a global audio stream that includes the system sounds audio stream that was rendered by the SAR; cancels from the input to the microphone (164): using the local audio stream captured by the SAC, the input of the voice audio stream received from the second system that was rendered by the SAR and output by the speaker (164), whereby the voice audio stream received from the second system is prevented from being rendered more than once by the SAR for output to the ^ p speaker (164); and using the global audio stream captured by the SAC, the input of the system sounds audio stream output by the operating system (156) that was rendered by the SAR and output by the speaker (0164, whereby the system sounds audio stream are prevented from being 32 transmitted by the RTC (160) to the second system over the packet switched network. 22. The real time communication system as claimed in claim 19, wherein the first and second RTC (160, 180) each include an AEC. 23. A computing system has an operating system (256) in communication with a speaker (262) and a microphone (264), the operating system (256) including a SAC and a SAR (258), the operating system (256) executing applications including a ^1^ media player application (MP) (260), wherein the MP (260) outputs a media audio stream to the SAR (258) that renders the same to the speaker (262) for an output that is then input to the microphone (264); the operating system (256) outputs a system sounds audio stream to the SAR (258) that renders the same to the speaker (262) for an output that is then input to the microphone (264); the microphone (264) receives an input of an ambient audio stream ^ p from ambient (266) that includes: the system soimds audio stream output by the speaker (262); the media audio stream output by the speaker (262); and a voice audio stream including vocal commands from a user (252) for operations to be carried out by the MP (260); the MP (260) comprises: 33 a » calls for the SAC (258) to capture from the renderings of the SAR (258): a local audio stream that includes the media audio stream; and a global audio stream that includes: the system sounds audio stream; and the media audio stream; ^T- cancels from the input to the microphone (264): using the local audio stream captured by the SAC (258), the input of the media audio stream, whereby the media audio stream is prevented from being output more than once by the speaker (262); and using the global audio stream captured by the SAC (258), the input of the system sounds audio stream and the media audio stream, whereby the MP (260) receives only the voice audio ^ 3 stream. Dated: February 16, 2004 S. JAY^RAM IN/PAU347 OF LAKSHMIKUMARAN & SRIDHARAN AGENT FOR THE APPLICANT 34 •

Documents:

212-del-2004-Abstract-(01-08-2013).pdf

212-del-2004-Claims-(01-08-2013).pdf

212-del-2004-Correspondence-Others-(01-08-2013).pdf

212-del-2004-Form-1-(01-08-2013).pdf

212-del-2004-form-1.pdf

212-del-2004-Form-3-(01-08-2013).pdf

212-del-2004-GPA-(01-08-2013).pdf

212-DEL-2004Claims211014.pdf

212-DEL-2004Correspondence211014.pdf

212-DEL-2004OTHERS211014.pdf