Broadcast transmitting/playback apparatus and method thereof

Patent metadata

Field	Value
Publication number	US-2016351201-A1
Application number	US-201615230616-A
Country	US
Kind code	A1
Filing date	Aug 8, 2016
Priority date	Dec 22, 2010
Publication date	Dec 1, 2016
Grant date	—

Abstract

A broadcast transmitting apparatus and method, and a broadcast playback apparatus and method for providing an object-based audio by encoding and decoding a multichannel audio signal are provided. The broadcast transmitting apparatus may generate audio identification information used to determine whether the multichannel audio signal is an object-based audio signal. When the multichannel audio signal is determined to be the object-based audio signal, based on the audio identification information, the broadcast playback apparatus may control and output the multichannel audio signal for each channel.

First claim

1 . A broadcast transmitting apparatus, comprising:
an audio encoder to encode a multichannel audio signal; and an audio identification information generator to generate audio identification information, the audio identification information being used to determine whether the multichannel audio signal is an object-based audio signal.

2 . The broadcast transmitting apparatus of claim 1 , wherein the audio identification information generator generates at least one piece of mixing information including a scheme of mixing channels, when the multichannel audio signal is determined to be the object-based audio signal.

3 . The broadcast transmitting apparatus of claim 1 , wherein the audio identification information generator generates the audio identification information in the form of a descriptor.

4 . A broadcast transmitting method, comprising:
encoding a multichannel audio signal; and generating audio identification information, the audio identification information being used to determine whether the multichannel audio signal is an object-based audio signal.

5 . The broadcast transmitting method of claim 4 , wherein the generating comprises, when the multichannel audio signal is determined to be the object-based audio signal, generating at least one piece of mixing information including a scheme of mixing channels.

6 . The broadcast transmitting method of claim 4 , wherein the generating comprises generating the audio identification information in the form of a descriptor.

7 . A broadcast playback apparatus, comprising:
a multichannel audio signal determining unit to determine whether an encoded multichannel audio signal in a bitstream is an object-based audio signal, based on audio identification information; and an audio decoder to decode the encoded multichannel audio signal, when encoded the multichannel audio signal is the object-based audio signal.

8 . The broadcast playback apparatus of claim 7 , further comprising:
a downmixing unit to downmix the multichannel audio signal to a stereo audio signal, when the encoded multichannel audio signal is determined to be the object-based audio signal.

9 . The broadcast playback apparatus of claim 8 , wherein the downmixing unit downmixes the multichannel audio signal to the stereo audio signal, based on mixing information.

10 . The broadcast playback apparatus of claim 8 , wherein the downmixing unit downmixes the multichannel audio signal to the stereo audio signal, based on (i) mixing information selected by a user operation from among the input mixing information or (ii) mixing information input by a user operation.

11 . The broadcast playback apparatus of claim 8 , wherein the audio decoder output the decoded multichannel audio signal without a change, when the encoded multichannel audio signal is a surround audio signal.

12 . A broadcast playback method, comprising:
determining whether an encoded multichannel audio signal in a bitstream is an object-based audio signal, based on audio identification information; and decoding the encoded multichannel audio signal, when encoded the multichannel audio signal is the object-based audio signal.

13 . The broadcast playback method of claim 12 , further comprising:
downmixing the multichannel audio signal to a stereo audio signal, when the encoded multichannel audio signal is determined to be the object-based audio signal.

14 . The broadcast playback method of claim 13 , wherein the downmixing comprises:
downmixing the multichannel audio signal to the stereo audio signal, based on mixing information.

15 . The broadcast playback method of claim 13 , wherein the downmixing comprises:
downmixing the multichannel audio signal to the stereo audio signal, based on (i) mixing information selected by a user operation from among the input mixing information, or (ii) mixing information input by a user operation.

16 . The broadcast playback method of claim 12 , wherein the decoding comprising:
outputting the decoded multichannel audio signal without a change, when the encoded multichannel audio signal is a surround audio signal

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Lee Yong Ju
• Lee Tae Jin
• Kang Kyeong Ok
• Kim Jin Woong
• Ahn Chie Teuk

Classifications

• H04H20/95

  characterised by a specific format, e.g. an encoded audio stream · CPC title

• H04N21/2335

  involving reformatting operations of audio signals, e.g. by converting from one coding standard to another (details of audio signal transcoding G10L19/173) · CPC title

• H04H20/89 Primary

  using three or more audio channels, e.g. triphonic or quadraphonic · CPC title

• G10L19/008

  Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing · CPC title

• H04N21/4394

  involving operations for analysing the audio stream, e.g. detecting features or characteristics in audio streams (arrangements characterised by components specially adapted for monitoring, identification or recognition of audio in broadcast systems H04H60/58) · CPC title