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Asynchronous sampling rate conversion device and method

An asynchronous sampling and conversion device technology, applied in the computer field, can solve problems such as complex filter design, and achieve the effects of simple structure, simplified structure and high conversion accuracy

Active Publication Date: 2020-01-17
ALLWINNER TECH CO LTD
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Problems solved by technology

[0008] It can be seen that there are two main defects in the asynchronous sampling rate converter in the prior art: one is that two clocks are required, and the initial signal is transmitted by the first sampling rate clock, which is converted into the second sampling rate clock through the asynchronous sampling rate; Sophisticated filter design and oversampling of data to a very high frequency

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  • Asynchronous sampling rate conversion device and method
  • Asynchronous sampling rate conversion device and method

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Embodiment Construction

[0049] The above describes the technical solution of the asynchronous sampling rate conversion method and device of the present invention. In order to describe the technical solution of the present invention in more detail and facilitate further understanding of the present invention, the following describes the specific implementation of the present invention in conjunction with the accompanying drawings. However, it should be understood that all the exemplary embodiments and their descriptions are used to explain the present invention, and do not constitute the only limitation to the present invention.

[0050] The asynchronous sampling rate conversion device 100 of the present invention includes an interpolation filter 110, a compensation module 120, a clock generator 130 and a frequency divider 140, such as figure 1 shown.

[0051] Wherein, the interpolation filter 110 performs interpolation filtering on the original signal data, so that the sampling rate of the signal dat...

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Abstract

The invention discloses an asynchronous sampling rate conversion device and conversion method. The device comprises an interpolation filter, a compensation module, a clock generator and a frequency eliminator, the device is simple in circuit, low in implementation cost and free of a complex high-order filter, lossless conversion can be achieved under the condition that only one sampling rate clockis needed, and the defects that in the prior art, two clocks are needed or a complex filter design is adopted, and data is oversampled to an asynchronous sampling rate conversion device with very high frequency are overcome.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a sampling rate converting device and a converting method. Background technique [0002] When a digital system processes multiple signals with different sampling rates, it generally needs to use a sampling rate converter to convert the signals of different sampling rates to the same sampling frequency. For example, in audio files, commonly used sampling rates are 11.025k, 22.05k, 44.1k series, or 8k, 16k, 32k, 48k series. The sound file and a 48k sound file are played at the same time, and it is necessary to perform asynchronous sample rate conversion (Asynchronous sample rate convert, ASRC) on one of the sound files. Asynchronous sampling rate conversion usually needs a special chip to complete, often involves a complex conversion system, and easily causes the degradation of signal quality. [0003] There are usually two types of asynchronous sampling rate conversion methods...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/12H03M3/00H03M1/06
CPCH03M1/125H03M3/496H03M1/0617
Inventor 付增功王伟邹建发丁然
Owner ALLWINNER TECH CO LTD
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