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Audio resume reproduction device and audio resume reproduction method

A reproduction device and audio technology, which is applied in speech analysis, instruments, etc., can solve the problems that the reproduced audio signal is not output, part or all of the decoding process cannot be processed, and the quality of the reproduced audio signal is degraded.

Inactive Publication Date: 2010-12-22
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the conventional configuration, when the coded audio signal in which the coded information is dispersed in a part of the coded frame and multiplexed asynchronously is decoded, and the reproduced audio signal is decoded and output, the When playback is resumed after the playback is interrupted by opening, etc., decoding cannot be performed in coded frames in which coded information has not been multiplexed, that is, in coded frames in which coded information for decoding processing cannot be extracted and applied. Some or all of the processing results in the reproduced audio signal not being output, or the quality of the reproduced audio signal deteriorating

Method used

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  • Audio resume reproduction device and audio resume reproduction method
  • Audio resume reproduction device and audio resume reproduction method
  • Audio resume reproduction device and audio resume reproduction method

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Experimental program
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no. 1 Embodiment approach

[0055] First, an audio playback device according to a first embodiment of the present invention will be described with reference to the drawings.

[0056] figure 1 It is a block diagram showing the audio playback device in the first embodiment. exist figure 1 Among them, 101 is a recording medium capable of storing a compressed stream, and the compressed stream is formed by summarizing time-series digital audio signals in units of encoded frames. 102 is a compressed stream control unit for maintaining the frame information before the interruption of reproduction, and when the reproduction is interrupted and restarted, it is used to judge whether the decoded frame is asynchronously multiplexed or not. The additional information and the frame information are restored, and the reading position of the compressed stream is calculated from the recording medium 101 . 103 is a compressed stream decoding unit, which decodes the compressed audio stream read by the compressed stream...

no. 2 Embodiment approach

[0064] figure 2 It is a block diagram showing the configuration of the audio playback device in the second embodiment. exist figure 2 Among them, 201 is a recording medium capable of storing a compressed stream, and the compressed stream is formed by summarizing time-series digital audio signals in units of coded frames. 202 is an interruption information storage memory, and when the reproduction is interrupted, the position to be restarted when the reproduction instruction is received next time is recorded as resume information. It is preferable that the interrupt information storage memory 202 is constituted by a nonvolatile memory in which information does not disappear even if the power is turned off or the like. 203 is a compressed stream control unit, which reads the compressed audio stream from the recording medium 201, and when receiving a playback interruption instruction, saves the frame information at the time of interruption in the interruption information stor...

no. 3 Embodiment approach

[0073] Figure 5 It is a block diagram showing the configuration of the audio playback device in the third embodiment.

[0074] 504 is the figure 1 The output control unit 205 of the output control unit 205 is an output control unit that can control whether to output the reproduced digital audio signal decoded by the compressed stream decoding unit 204 as sound according to the instruction of the reproduction start position control unit 503 .

[0075] The compressed stream control unit 203 includes a stream reading control unit 501 , a restoration additional information writing determination unit 502 , and a playback start position control unit 503 . The stream reading control unit 501 reads a compressed audio stream from the recording medium 201 and sends it to the compressed stream decoding unit 204 . The restored additional information writing determination unit 502 analyzes the restored additional information I(n) generated by the compressed stream decoding unit 204, a...

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Abstract

An audio reproduction device comprises an interruption information storage memory (202) for holding the frame information during the interruption of reproduction, a compressed stream control unit (203) for calculating and reading the position at which a compressed stream is read from a recording medium (201), a compressed stream decoding part (204) for decoding the compressed stream and transmitting decoding information on the frame to the compressed stream control unit (203) as resume additional information, and an output control unit (205) for outputting the results of the decoding. When the reproduction is once interrupted and resumed, the read position of the compressed stream is calculated and read from the resume additional information and the frame information during the interruption, thereby allowing the reproduction to be resumed with no section or no frequency band not reproduced in terms of time.

Description

technical field [0001] The present invention relates to a compressed audio stream in which coded information is dispersed in a part of coded frames and multiplexed asynchronously, having a resume playback function for restarting playback after playback has been interrupted due to power off or the like, and Audio playback device and playback method with special playback functions such as fast forward and reverse. Background technique [0002] use Figure 24 , 25 , the configuration and operation of a conventional audio reproduction device having a resume reproduction function will be described. [0003] exist Figure 24 Among them, 2401 is a recording medium capable of storing a compressed stream formed by summarizing time-series digital audio signals in units of coded frames. Reference numeral 2402 is an interruption information storage memory for recording, as resume information, the position at which reproduction should be resumed when the next reproduction instruction i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/02
CPCG10L19/167
Inventor 木村幸彦横山宇志大冈徹也
Owner PANASONIC CORP
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