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Audio decoding apparatus

An audio decoding and audio decoder technology, applied in the field of audio decoding devices, can solve problems such as long time, and achieve the effect of audio reproduction

Inactive Publication Date: 2011-03-16
SOCIONEXT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because as the number of samples per frame of the audio stream input to ADEC1 is greater than that of the audio stream input to ADEC2, the transmission from ADEC1 of frame data with a larger sample size requires longer time, and the delay is relative to that of ADEC2 (decoding request, etc.)

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Embodiment Construction

[0029] Hereinafter, embodiments of the present invention will be explained in detail with reference to the drawings.

[0030] figure 2 It is a functional block diagram showing the structure of the audio decoding device 10 in this embodiment. The audio decoding device 10 is a device that decodes two compressed audio streams and reproduces the decoding result. The audio decoding device 10 consists of (i) the following components for processing the first audio stream: a first audio decoder (ADEC1) 11, a first intermediate buffer 12, a first output buffer (AOB1) 13, and a first audio The output unit (AOUT1) 14, and (ii) the following components for processing the second audio stream: the second audio decoder (ADEC2) 2, the second intermediate buffer 16, the second output buffer (AOB2) 17, and The second audio output unit (AOUT2) 18, and (iii) an output control unit 19 that controls all is constituted.

[0031] The first audio decoder 11 is a decoder that decodes the first audio sign...

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Abstract

The present invention provides an audio decoding apparatus which can decode and reproduce a plurality of compressed audio streams simultaneously without sound interruption, even when the number of samples per frame is different. The audio decoding apparatus includes: a first and second audio decoder which decode two inputted compressed audio streams, and output audio data; a first and second intermediate buffer which temporarily hold the outputted audio data; a first and second audio output unit which convert the audio data into audio signals and output such audio signals; an output control unit which reads the audio data from the first and second intermediate buffer, and transmits the audio data to the first and second audio output unit. The output control unit repeats the reading and transmission of either the same number of samples of audio data or the number of samples of audio data for the same amount of transmission time, from the first and second intermediate buffer to the first and second output unit.

Description

Technical field [0001] The present invention relates to an audio decoding device that decodes compressed audio streams, and more specifically, to an audio decoding device that simultaneously decodes multiple audio streams and outputs the decoded audio streams as audio signals. Background technique [0002] In recent years, with the development of communication technology and the diversification of audio / video equipment, various decoder LSIs that decode compressed video and audio signals have been provided. [0003] For example, it provides a high-performance LSI that simultaneously decodes high-fidelity video signals for two channels (see Non-Patent Document 1: NEC Electronics, "System LSIμPD61160 for Digital Hi-Vision Television", Internet <URL: http: / / www.necel.com / digital_av / japanese / mpegdec / d61160.html> Retrieved on August 30, 2004). Through this LSI, you can watch the video of one TV program and simultaneously record the video of another TV program. [0004] However, alth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/00H03M7/30G10L19/008
CPCG10L19/167
Inventor 角野英之末吉雅弘西尾孝祐
Owner SOCIONEXT INC