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Audio encoding and decoding

A decoder and audio channel technology, applied in the field of audio coding and/or decoding, which can solve problems such as inflexibility, achieve high flexibility, low overhead, and improve the quality-bit rate ratio.

Active Publication Date: 2011-04-13
KONINKLIJKE PHILIPS ELECTRONICS NV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the problem with such an approach is that the decoder structure must match that of the encoder
While this can be achieved using standardized encoder and decoder structures, such an approach is inflexible and will tend to result in sub-optimal performance

Method used

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Embodiment Construction

[0088] The following description focuses on embodiments of the invention applicable to encoding and decoding multi-channel audio signals by using multiple low-complexity channel down-mixers and up-mixers. However, it will be appreciated that the invention is not limited to this application. Those skilled in the art will appreciate that a down-mixer is arranged to combine multiple audio channels into a lower number of audio channels and additional parameter data, and an up-mixer is arranged to generate Multiple audio channels. Thus, the upmixer provides channel splitting functionality.

[0089] figure 1 Illustrated is a transmission system 100 for communicating audio signals in accordance with some embodiments of the present invention. The transmission system 100 comprises a transmitter 101 coupled to a receiver 103 via a network 105 which may in particular be the Internet.

[0090] In the particular example, the transmitter 101 is a signal recording device and the receiver...

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Abstract

An audio encoder (109) has a hierarchical encoding structure and generates a data stream comprising one or more audio channels as well as parametric audio encoding data. The encoder (109) comprises an encoding structure processor (305) which inserts decoder tree structure data into the data stream. The decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoder structure and may specifically specify the decoder tree structures to be applied by a decoder. A decoder (115) comprises a receiver (401) which receives the data stream and a decoder structure processor (405) for generating the hierarchical decoder structure in response to the decoder tree structure data. A decode processor (403) then generates output audio channels from the data stream using the hierarchical decoder structure.

Description

[0001] This application is a divisional application of an invention patent application with an application date of July 7, 2006, an application number of 200680025555.5, and an invention title of "Audio Coding and Decoding". technical field [0002] The invention relates to audio encoding and / or decoding using a hierarchical coding structure and / or a hierarchical decoder structure. Background technique [0003] In the field of audio processing, it is well known to convert a plurality of audio channels into an additional, larger number of audio channels. Such transformations may be performed for various reasons. For example, audio signals may be converted to another format to provide an enhanced user experience. For example, traditional stereo recordings include only two channels, whereas modern advanced audio systems typically use five or six channels, as in popular 5.1 surround sound systems. Thus, two stereo channels can be converted to five or six channels to take full ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/008
CPCG10L19/008H04S2420/03G10L19/24H04N21/233
Inventor E·G·P·舒杰斯G·H·霍索H·普尔恩哈根W·A·施尔德巴克H·霍里克H·M·K·克约林K·J·罗登
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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