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Method, medium, and system encoding and/or decoding audio signals by using bandwidth extension and stereo coding

A technology of audio signal encoding and bandwidth expansion, which can be used in speech analysis, instruments, etc., and can solve problems such as audio signal quality deterioration

Inactive Publication Date: 2012-11-14
SAMSUNG ELECTRONICS CO LTD
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Problems solved by technology

Therefore, the quality of the audio signal will deteriorate

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  • Method, medium, and system encoding and/or decoding audio signals by using bandwidth extension and stereo coding
  • Method, medium, and system encoding and/or decoding audio signals by using bandwidth extension and stereo coding
  • Method, medium, and system encoding and/or decoding audio signals by using bandwidth extension and stereo coding

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Embodiment Construction

[0028] invention model

[0029] Embodiments of the present invention will now be described in detail, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like parts throughout. In this case, the embodiments of the present invention may be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Accordingly, the following embodiments are for descriptive purposes only, to explain aspects of the present invention by referring to the figures.

[0030] figure 1 A system for encoding an audio signal according to an embodiment of the present invention is shown.

[0031] refer to figure 1 , the system may include a stereo encoding unit 100, a band segmentation unit 110, a first modified discrete cosine transform (MDCT) application unit 120, a frequency linear prediction performance unit 130, a multi-resolution analysis unit 140, a quantization unit 150, a context-based bit plan...

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Abstract

A method, medium, and system encoding and / or decoding an audio signal by extracting stereo parameters from an input signal, encoding the stereo parameters, and performing down-mixing on the input signal, splitting the down-mixed signal into a low band signal and a high band signal, converting each of the low band signal and the high band signal from a time domain to a frequency domain, generatingan encoded bitplane by performing quantization and context-dependent encoding on the converted low band signal, generating and encoding bandwidth extension information that represents a characteristic of the converted high band signal by using the converted low band signal, and outputting the encoded stereo parameters, the encoded bitplane, and the encoded bandwidth extension information. Accordingly, high frequency components and stereo components may be efficiently encoded and decoded at a potential restricted bit rate, thereby improving the quality of an audio signal.

Description

technical field [0001] One or more embodiments of the present invention relate to methods, media and systems for encoding and / or decoding audio signals, and more particularly, to methods, media and systems for encoding and / or decoding audio signals by using bandwidth extension and stereo coding system. Background technique [0002] When an audio signal is encoded or decoded, the quality of the audio signal should generally be maximized by using a limited bit rate. The number of available bits at a low bit rate is small, so that the audio signal must be encoded or decoded by reducing the frequency bandwidth of the audio signal. Therefore, the quality of the audio signal may deteriorate. [0003] Generally, low frequency components are more important for humans to recognize audio signals than high frequency components. Therefore, as set forth herein, the inventors of the present invention have determined that a method by increasing the number of bits allocated for encoding ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00G10L21/02G10L19/008G10L19/02G10L19/04
CPCG10L19/008G10L19/0204G10L19/032G10L19/06G10L21/0388
Inventor 吴殷美朱基岘金重会
Owner SAMSUNG ELECTRONICS CO LTD
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