# US 11,442,687 B2 · Audio transmission device and operating system utilizing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,687 B2 - Document ID: US11442687B2 - Status: Granted - Kind: B2 - Application number: 16/891,851 - Filed: 2020-06-03 - Published: 2021-01-28 - Granted: 2022-09-13 - Earliest claimed: 2019-07-26 - Assignees: Via Labs, Inc. - Applicants: Via Labs, Inc. - Inventors: Chih-Hsien Lin; Chin-Sung Hsu; Li-Feng Pan - Web page: https://patentgrep.com/patent/US11442687B2 ## CPC - G06F 3/162: {Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs} - G10L 19/00: Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis (in musical instruments G10H) - H04M 1/60: including speech amplifiers - H04M 1/72409: by interfacing with external accessories (hands-free H04M1/60) - G10L 21/0208: Noise filtering - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G10L: SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract An audio transmission device coupled to an electronic device and including a detection circuit, a vendor-defined class circuit, and an audio class circuit is provided. The detection circuit detects an external sound to generate an input voice. The vendor-defined class circuit provides a first voice signal to the electronic device according to the input voice. An audio processing application program of the electronic device processes the first voice signal to generate a processed voice to the vendor-defined class circuit. The audio class circuit receives the processed voice from the vendor-defined class circuit, uses the processed voice as a second voice signal, and provides the second voice signal to the media manager of the electronic device. ## Claims ### Claim 1 An audio transmission device coupled to an electronic device and comprising: a first transmission interface configured to connect to the electronic device; a detection circuit detecting an external sound to generate an input voice; a vendor-defined class circuit generating a first voice signal according to the input voice, providing the first voice signal to the electronic device via the first transmission interface and receiving a processed voice via the first transmission interface, wherein an audio processing application program of the electronic device processes the first voice signal to generate the processed voice to the first transmission interface; and an audio class circuit receiving the processed voice from the vendor-defined class circuit, using the processed voice as a second voice signal and providing the second voice signal to a media manager of the electronic device via the first transmission interface, wherein: the vendor-defined class circuit comprises: a first interface providing the first voice signal to the first transmission interface and receiving the processed voice from the first transmission interface; and a second interface providing the processed voice to the audio class circuit, the first interface is directly connected to the first transmission interface, and the second interface does not connect to the first transmission interface. ### Claim 2 (depends on 1) The audio transmission device as claimed in claim 1, further comprising: an analog-to-digital converter converting the input voice to generate a digital signal, wherein the vendor-defined class circuit processes the digital signal to generate the first voice signal. ### Claim 3 (depends on 1) The audio transmission device as claimed in claim 1, further comprising: a hub comprising: an upstream port coupled to the first transmission interface to provide the first voice signal to the electronic device and receive the processed voice of the electronic device; a first downstream port coupled to the vendor-defined class circuit to provide the first voice signal to the upstream port and receiving the processed voice from the upstream port; and a second downstream port coupled to the audio class circuit to provide the second voice signal to the upstream port. ### Claim 4 (depends on 3) The audio transmission device as claimed in claim 3, wherein the hub is a USB hub. ### Claim 5 (depends on 3) The audio transmission device as claimed in claim 3, further comprising: a microcontroller circuit configured to direct the vendor-defined class circuit to output the first voice signal to the first downstream port and to direct the audio class circuit to output the second voice signal to the second downstream port. ### Claim 6 (depends on 1) The audio transmission device as claimed in claim 1, further comprising: a second transmission interface configured to transmit an output voice, wherein the audio class circuit receives the output voice from the electronic device and provides the output voice to the second transmission interface. ### Claim 7 (depends on 6) The audio transmission device as claimed in claim 6, further comprising: a digital-to-analog converter coupled between the audio class circuit and the second transmission interface to convert the output voice from a digital format into an analog format and to provide the output voice having the analog format to the second transmission interface. ### Claim 8 (depends on 1) The audio transmission device as claimed in claim 1, further comprising: a second transmission interface configured to transmit the processed voice, wherein the vendor-defined class circuit outputs the processed voice to the second transmission interface. ### Claim 9 (depends on 1) The audio transmission device as claimed in claim 1, further comprising: a mechanism element operating according to a control signal, wherein the audio processing application program of the electronic device processes the first voice signal to generate the control signal so that the mechanism element rotates and moves toward a sound source. ### Claim 10 An operating system comprising: an electronic device comprising: an audio processing application program; a native application program; and a media manager configured to provide a voice signal to the native application program; and an audio transmission device configured to couple to the electronic device and comprising: a first transmission interface configured to connect to the electronic device; a detection circuit detecting an external sound to generate an input voice; a vendor-defined class circuit generating a first voice signal according to the input voice, providing the first voice signal to the audio processing application program via the first transmission interface and receiving a processed voice via the first transmission interface, wherein the audio processing application program processes the first voice signal to generate the processed voice and provides the processed voice to the first transmission interface; and an audio class circuit receiving the processed voice provided by the vendor-defined class circuit, using the processed voice as a second voice signal and providing the second voice signal to the media manager via the first transmission interface, wherein: the vendor-defined class circuit comprises: a first interface providing the first voice signal to the first transmission interface and receiving the processed voice from the first transmission interface; and a second interface providing the processed voice to the audio class circuit, the first interface is directly connected to the first transmission interface, and the second interface does not connect to the first transmission interface. ### Claim 11 (depends on 10) The operating system as claimed in claim 10, wherein the audio transmission device further comprises: an analog-to-digital converter converting the input voice to generate a digital signal to the vendor-defined class circuit, wherein the vendor-defined class circuit processes the digital signal to generate the first voice signal. ### Claim 12 (depends on 10) The operating system as claimed in claim 10, wherein the audio transmission device further comprises: a hub comprising: an upstream port coupled to the first transmission interface to provide the first voice signal to the electronic device and receive the processed voice of the electronic device; a first downstream port coupled to the vendor-defined class circuit to provide the first voice signal to the upstream port and receiving the processed voice from the upstream port; and a second downstream port coupled to the audio class circuit to provide the second voice signal to the upstream port. ### Claim 13 (depends on 12) The operating system as claimed in claim 12, wherein the audio transmission device further comprises: a microcontroller circuit configured to direct the vendor-defined class circuit to output the first voice signal to the first downstream port and direct the audio class circuit to output the second voice signal to the second downstream port. ### Claim 14 (depends on 10) The operating system as claimed in claim 10, wherein the audio transmission device further comprises: a second transmission interface configured to transmit an output voice, wherein the audio class circuit receives the output voice from the electronic device and provides the output voice to the second transmission interface. ### Claim 15 (depends on 14) The operating system as claimed in claim 14, wherein the audio transmission device further comprises: a digital-to-analog converter coupled between the audio class circuit and the second transmission interface to convert the output voice from a digital format into an analog format and to provide the output voice having the analog format to the second transmission interface. ### Claim 16 (depends on 10) The operating system as claimed in claim 10, wherein the audio transmission device further comprises: a second transmission interface configured to transmit the processed voice, wherein the vendor-defined class circuit outputs the processed voice to the second transmission interface. ### Claim 17 (depends on 10) The operating system as claimed in claim 10, wherein the audio transmission device further comprises: a mechanism element operating according to a control signal, wherein the audio processing application program of the electronic device processes the first voice signal to generate the control signal so that the mechanism element rotates and moves toward the sound source. ### Claim 18 (depends on 10) The operating system as claimed in claim 10, wherein the audio transmission device further comprises: a USB connection port configured to couple to the electronic device. ### Claim 19 (depends on 10) The operating system as claimed in claim 10, wherein the vendor-defined class circuit and the audio class circuit are integrated into the audio transmission device, and the audio transmission is disposed independent of the electronic device. ### Claim 20 (depends on 19) The operating system as claimed in claim 19, wherein the audio transmission device is a dongle or the audio transmission device is integrated in a cable.