# US 2013/0160071 A1 · Digital broadcast transmitter, digital broadcast receiver, and audio description descriptor processing methods thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0160071 A1 - Document ID: US20130160071A1 - Status: Published application - Kind: A1 - Application number: 13/713,170 - Filed: 2012-12-13 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Moon-ju KIM - Web page: https://patentgrep.com/patent/US20130160071A1 ## CPC - H04N 7/17309: {Transmission or handling of upstream communications} - H04N 21/4348: {Demultiplexing of additional data and video streams} - H04N 21/4396: {by muting the audio signal} - H04N 21/4852: {for modifying audio parameters, e.g. switching between mono and stereo} - H04N 21/8106: {involving special audio data, e.g. different tracks for different languages} - H04N 21/814: {comprising emergency warnings (arrangements specially adapted for emergency or urgency in broadcast systems H04H20/59; arrangements for providing alarms, notifications, alerts to substation in data switching networks H04L12/1895)} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A digital broadcast receiver is provided. The digital broadcast receiver includes a broadcast reception unit which receives a digital broadcast signal; a signal separation unit which separates a main audio signal, an auxiliary audio signal, and an audio description descriptor from the received digital broadcast signal; an extraction unit which extracts auxiliary information from the audio description descriptor; a mixing unit which generates an audio signal by mixing the main audio signal and the auxiliary audio signal based on the auxiliary information; and an audio output unit which outputs the audio signal. ## Claims ### Claim 1 A digital broadcast receiver comprising: a broadcast reception unit which receives a digital broadcast signal; a signal separation unit which separates a main audio signal, an auxiliary audio signal, and an audio description descriptor from the received digital broadcast signal; an extraction unit which extracts auxiliary information from the audio description descriptor; a mixing unit which generates an audio signal by mixing the main audio signal and the auxiliary audio signal based on the auxiliary information; and an audio output unit which outputs the audio signal. ### Claim 2 (depends on 1) The digital broadcast receiver of claim 1, wherein the auxiliary information comprises language information, and wherein the digital broadcast receiver further comprises a control unit which sets a default language for the digital broadcast receiver based on the language information extracted from the auxiliary information. ### Claim 3 (depends on 1) The digital broadcast receiver of claim 1, wherein the received digital broadcast signal comprises a plurality of main audio signals corresponding to different languages, and the auxiliary information comprises language information, wherein the mixing unit mixes one of the plurality of main audio signals having a language that corresponds to the language information and the auxiliary audio signal. ### Claim 4 (depends on 1) The digital broadcast receiver of claim 1, wherein the received digital broadcast signal comprises a plurality of main audio signals and a plurality of auxiliary audio signals, and the auxiliary information comprises language information, wherein the mixing unit mixes one of the plurality of main audio signals corresponding to the language information and one of the plurality of auxiliary audio signals corresponding to the language information. ### Claim 5 (depends on 4) The digital broadcast receiver of claim 4, wherein the language information comprises first language information and second language information, and the mixing unit mixes the one of the plurality of main audio signals having a first language corresponding to the first language information and the one of the plurality of auxiliary audio signals having a second language corresponding to the second language information. ### Claim 6 (depends on 1) The digital broadcast receiver of claim 1, wherein the received digital broadcast signal comprises a plurality of main audio signals and a plurality of auxiliary audio signals, and the auxiliary information comprises language information, wherein the mixing unit mixes one of the plurality of main audio signals corresponding to a default language set in the digital broadcast receiver and one of the plurality of auxiliary audio signals which has a language corresponding to the language information. ### Claim 7 (depends on 1) The digital broadcast receiver of claim 1, wherein the auxiliary information comprises mute information, wherein the mixing unit mixes the main audio signal and the auxiliary audio signal such that the auxiliary audio signal is muted during a period indicated by the mute information. ### Claim 8 (depends on 1) The digital broadcast receiver of claim 1, wherein the auxiliary audio signal comprises an Emergency Alert System (EAS) audio signal and the auxiliary information comprises EAS information, wherein the mixing unit mixes both the main audio signal and the EAS audio signal during a period indicated by the EAS information. ### Claim 9 (depends on 1) The digital broadcast receiver of claim 1, wherein the auxiliary audio signal comprises an EAS audio signal and the auxiliary information comprises EAS information, wherein the mixing unit outputs only the EAS audio signal among the main audio signal and the EAS audio signal during a period indicated by the EAS information. ### Claim 10 (depends on 1) The digital broadcast receiver of claim 1, wherein the auxiliary information is recorded in a reserved field of the audio description descriptor. ### Claim 11 A digital broadcast transmitter comprising: a signal input unit which receives a main audio signal and an auxiliary audio signal; a descriptor generation unit which generates an audio description descriptor including auxiliary information; a signal merge unit which generates a digital broadcast signal by merging the generated audio description descriptor, the main audio signal, and the auxiliary audio signal; and a broadcast transmission unit which transmits the generated digital broadcast signal. ### Claim 12 (depends on 11) The digital broadcast transmitter of claim 11, wherein the auxiliary information comprises at least one of language information, Emergency Alert System (EAS) information, and mute information. ### Claim 13 (depends on 11) The digital broadcast transmitter of claim 11, wherein the descriptor generator records the auxiliary information into a reserved field of the audio description descriptor. ### Claim 14 An audio description descriptor processing method of a digital broadcast receiver, the audio description descriptor processing method comprising: receiving a digital broadcast signal; separating a main audio signal, an auxiliary audio signal, and an audio description descriptor from the received digital broadcast signal; extracting auxiliary information from the audio description descriptor; mixing the main audio signal and the auxiliary audio signal based on the auxiliary information to generate an audio signal; and outputting the audio signal. ### Claim 15 (depends on 1) The audio description descriptor processing method of claim 1, wherein the auxiliary information comprises language information, and wherein the audio description descriptor processing method further comprises setting a default language for the digital broadcast receiver based on the language information extracted from the auxiliary information. ### Claim 16 (depends on 14) The audio description descriptor processing method of claim 14, wherein the received digital broadcast signal comprises a plurality of main audio signals, and the auxiliary information comprises language information, wherein the mixing comprises mixing one of the plurality of main audio signals having a language that corresponds to the language information and the auxiliary audio signal. ### Claim 17 (depends on 14) The audio description descriptor processing method of claim 14, wherein the received digital broadcast signal comprises a plurality of main audio signals and a plurality of auxiliary audio signals and the auxiliary information comprises language information, wherein the mixing comprises mixing one of the plurality of main audio signals corresponding to the language information and one of the plurality of auxiliary audio signals corresponding to the language information. ### Claim 18 (depends on 17) The audio description descriptor processing method of claim 17, wherein the language information comprises first language information and second language information, and the mixing comprises mixing the one of the plurality of main audio signals having a first language corresponding to the first language information and the one of the plurality of auxiliary audio signals having a second language corresponding to the second language information. ### Claim 19 (depends on 14) The audio description descriptor processing method of claim 14, wherein the received digital broadcast signal comprises a plurality of main audio signals and a plurality of auxiliary audio signals, and the auxiliary information comprises language information, wherein the mixing comprises mixing one of the plurality of main audio signals corresponding to a default language set in the digital broadcast receiver and one of the plurality of auxiliary audio signals which has a language corresponding to the language information. ### Claim 20 (depends on 14) The audio description descriptor processing method of claim 14, wherein the auxiliary information comprises mute information, wherein the mixing comprises mixing the main audio signal and the auxiliary audio signal such that the auxiliary audio signal is muted during a period indicated by the mute information. ### Claim 21 (depends on 14) The audio description descriptor processing method of claim 14, wherein the auxiliary audio signal comprises an Emergency Alert System (EAS) audio signal and the auxiliary information comprises EAS information, wherein the mixing comprises mixing both the main audio signal and the EAS audio signal during a period indicated by the EAS information. ### Claim 22 (depends on 14) The audio description descriptor processing method of claim 14, wherein the auxiliary audio signal comprises an EAS audio signal and the auxiliary information comprises EAS information, wherein the mixing comprises outputting only the EAS audio signal among the main audio signal and the EAS audio signal during a period indicated by the EAS information. ### Claim 23 (depends on 14) The audio description descriptor processing method of claim 14, wherein the auxiliary information is recorded in a reserved field of the audio description descriptor. ### Claim 24 An audio description descriptor processing method of a digital broadcast transmitter, the audio description descriptor processing method comprising: receiving a main audio signal and an auxiliary audio signal; generating an audio description descriptor which includes auxiliary information; generating a digital broadcast signal by merging the generated audio description descriptor, the main audio signal, and the auxiliary audio signal; and transmitting the generated digital broadcast signal. ### Claim 25 (depends on 24) The audio description descriptor processing method of claim 24, wherein the auxiliary information comprises at least one of language information, Emergency Alert System (EAS) information, and mute information. ### Claim 26 (depends on 24) The audio description descriptor processing method of claim 24, wherein the generating comprises recording the auxiliary information into a reserved field of the audio description descriptor. ### Claim 27 (depends on 1) The digital broadcast receiver of claim 1, wherein the received digital broadcast signal comprises a plurality of main audio signals, each of which correspond to one of a plurality of different languages, and a plurality of auxiliary audio signals, each of which correspond to one of the plurality of different languages, and the mixing unit selects the one of the plurality of main audio signals having a language that corresponds to the language information and the one of the plurality of auxiliary audio signals having the language that corresponds to the language information.