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Method, device and system for testing DRA consistency

A test method and test system technology, applied in speech analysis, instruments, etc., can solve the problems of not giving DRA audio conformance test method information and enlightenment, and achieve the effect of high-efficiency conformance test

Active Publication Date: 2012-10-17
广东广晟研究开发院有限公司
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Problems solved by technology

Although the above output document discusses and expounds the conformance test method of MPEG audio signal in detail, it does not give any information and enlightenment about the conformance test method of DRA audio

Method used

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  • Method, device and system for testing DRA consistency
  • Method, device and system for testing DRA consistency
  • Method, device and system for testing DRA consistency

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Embodiment Construction

[0021] 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.

[0022] A typical DRA audio encoder is shown in FIG. 1, which can 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 20, multi-resolution filter bank module 22, linear scalar quantization module 30, quantization index encoding module 32, codebook selection module 34, human auditory model module 40, A global bit alloc...

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Abstract

The invention relates to a method for testing DRA consistency, which comprises the following steps: transmitting a plurality of test code streams to a standard DRA decoder serving as a DRA standard decoder and a tested DRA decoder sequentially and respectively to decode the test code streams to generate a plurality of first processing signals and a plurality of second processing signals; calculating at least one statistical measurement on the basis of the plurality of first processing signals and the plurality of second processing signals; and determining whether the tested DRA decoder is qualified by comparing the at least one statistical measurement with at least one preset threshold corresponding to the at least one statistical measurement. The plurality of test code streams traverse the stream frame header condition, window sequence information condition and Huffman coding condition of the standard DRA decoder, the at least one statistical measurement comprises a mean square root of the difference between the plurality of first processing signals and the plurality of second processing signals, and a preset threshold, corresponding to the mean square root, in the at least one preset threshold is 2<-15>. In addition, the invention also discloses a corresponding device and a corresponding system for testing the DRA consistency.

Description

technical field [0001] The present invention relates to a consistency testing method and device, more particularly, to a consistency testing method and device for DRA audio signals. Background technique [0002] As we all know, due to manufacturing precision, non-ideal environment and other reasons, hardware products manufactured according to certain technical specifications may have certain errors compared with the original technical specifications under ideal conditions. In response to the above problems, a method called "consistency testing" has been proposed to give the following judgment results relatively objectively: products manufactured according to certain technical specifications, or even a complete set of equipment composed of multiple above-mentioned products , how much error exists relative to the original technical specification under ideal conditions, and whether the error meets the requirements of the relevant error in the technical specification. In other ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00G10L25/03
Inventor 张尉雄郑楚升张景平张培
Owner 广东广晟研究开发院有限公司
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