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Average bit rate (ABR) code rate control method and system for digital rise audio (DRA)

A code rate control and coding technology, applied in speech analysis, instruments, etc., can solve problems such as running out of bits, unstable coding quality, and no bits available

Inactive Publication Date: 2010-10-06
数维科技(北京)有限公司
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Problems solved by technology

The above method has the following disadvantages: (1) the bit pool is not controlled, and the number of bits in the bit pool of some signals may be used up quickly, and there is no bit available in the bit pool when editing the following frames, resulting in poor coding quality. smooth
(2) There is a certain risk in completely relying on perceptual entropy for bit control
The technical content related to this is not disclosed in the prior art

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  • Average bit rate (ABR) code rate control method and system for digital rise audio (DRA)
  • Average bit rate (ABR) code rate control method and system for digital rise audio (DRA)
  • Average bit rate (ABR) code rate control method and system for digital rise audio (DRA)

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Embodiment Construction

[0061] Preferred embodiments of the present invention will be described hereinafter by means of the accompanying drawings. In the following description, functions or constructions that have become prior art will not be described in detail since they would obscure the description of the present invention in unnecessary detail. The same reference numbers designate the same steps in the method or the same components in the system.

[0062] A typical DRA audio encoder 100 is shown in FIG. 1A, which may be implemented by hardware, software, and / or firmware. In short, the technology involved in the DRA standard is to perform signal processing on the source sound (for example, input PCM samples) with multiple technical modules, so as to achieve the purpose of almost lossless compression of the source sound. The above technical modules include but are not limited to: transient analysis module 120, multi-resolution filter bank module 122, linear scalar quantization module 130, quantiz...

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Abstract

The invention relates to an average bit rate (ABR) code rate control method for digital rise audio (DRA). The method comprises the step of calculating the bit number of the current frame according to the bit demand rate of the current frame and the bit budget rate of a bit reservoir, wherein when the bit demand rate of the current frame is a function of encoding easiness and the bit budget rate of the bit reservoir is a function of saturation of the bit reservoir. The invention also provides a corresponding system. The method and the system can improve the encoding efficiency of the DRA.

Description

technical field [0001] The present invention relates to an ABR code rate control method and system, and more specifically, relates to an ABR code rate control technology for DRA digital audio coding algorithm. Background technique [0002] As shown in Figures 1A-1B, the DRA audio encoding and decoding technology, which is the standard of China's audio encoding electronics industry, has been well known in the industry in recent years. For more detailed content about the DRA (Digital RiseAudio) audio codec technology, please refer to the industry standard with the standard number SJ / T 11368-2006 issued by the Ministry of Information Industry on January 4, 2007. The entire content of this standard is quoted here way incorporated into this article. In addition, for convenience of description, the standard is referred to as "DRA standard" hereinafter, and the DRA audio codec technology corresponding to the DRA standard is referred to as "DRA technology" for short. [0003] Curr...

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Application Information

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IPC IPC(8): G10L19/02G10L19/002
Inventor 王磊闫建新
Owner 数维科技(北京)有限公司
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