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Audio-frequency decoding system and audio-frequency for mat detecting method

An audio decoding and format technology, applied in the field of audio decoding systems, can solve problems such as signal loss, and achieve the effect of lowering the price and reducing the burden on the CPU

Inactive Publication Date: 2007-01-10
LG ELECTRONIC (HUIZHOU) CO LTD
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AI Technical Summary

Problems solved by technology

[0005] In addition, I 2 The S signal is prone to signal loss when the wire is lengthened, but contrary to the situation that it is troublesome to manage with several wires, the above-mentioned SPDIF signal transmits all data and clocks through only one wire, so even if there is a problem during the transmission Some falloffs are also able to accurately complete teleportation

Method used

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  • Audio-frequency decoding system and audio-frequency for mat detecting method
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  • Audio-frequency decoding system and audio-frequency for mat detecting method

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Embodiment Construction

[0045] Other objects, characteristics and advantages of the present invention will be understood through the detailed description of the embodiments with reference to the accompanying drawings.

[0046] Now, the structure and function of the embodiment of the present invention will be described in detail with reference to the accompanying drawings. As shown in the figure, the structure and function of the present invention are explained by at least one embodiment. Therefore, the above-mentioned technical idea of ​​the present invention and its core structure and function are not limited thereto.

[0047] image 3 It is a block diagram showing the structure of an embodiment of the audio data format detection unit provided in the audio decoder 103. It is assumed that the SPDIF data input to the audio decoder is encoded by the AC-3 encoding algorithm. That is, the audio decoder uses the AC-3 decoding algorithm to decode the input SPDIF audio data.

[0048] refer to image 3 ...

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Abstract

The present invention relates to device and method to make self-distinguishing the PCM or bit stream of SPDIF input format on audio decoder. Said invention decodes the inputted voice data according to distinguishing result, to reduce the incorrect operation of audio decoder to the least in converting inputted voice data from SPDIF PCM to SPDIF bit stream. Said invention also can sense audio data format conversion for reducing CPU load and audio decoding system price.

Description

technical field [0001] The invention relates to an audio decoding system, in particular to an audio format detection method for discriminating whether the SPDIF input format is PCM or bit stream on an audio decoder. Background technique [0002] Usually, audio data is transmitted using three pointers: audio data, sampling clock, and left-right clock (audio data, sampling clock, left-right clock). [0003] The above-mentioned SPDIF (Sony / Philips Digital Interface) is the collective name of IEC60958 / 61937, and is an audio data transmission format jointly developed by SONY / PHILIPS. That is, digital transmission with products purchased by consumers is realized through digital signals of standard specifications advocated by Sony Corporation and Philips Corporation. [0004] In addition, the above-mentioned SPDIF format uses a bi-phase mark technique in which the sampling clock and the left and right clocks are included in the data, and is transmitted as a pointer. Therefore, it...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L21/02H03M7/00G10L19/005G10L19/22
Inventor 李准一黄泰勋
Owner LG ELECTRONIC (HUIZHOU) CO LTD
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