Audio player
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsSeigo Suguta, Ichiro Kawashima, Hiroyuki Goto
Life of this patent
Estimating the term…
Abstract
When underflow of a sub-Q data table occurs, a sub-Q data processing section does not read and output sub-Q data but outputs only audio data. Moreover, to achieve consistency between audio data and the sub-Q data in terms of buffer management, an input processing section includes respective counters for managing respective input data amounts of the audio data and the sub-Q data. Then, the input processing section executes management so that overflow and underflow of the sub-Q data table are suppressed as much as possible and a switch changes an IEC output mode at a time of audio processing and a time of dubbing. Thus, sound deterioration, and error recording in equipment to which the audio player is connected, and the like can be prevented.
Claims8
An audio player which has a function of audio-processing data from a digital input, extracting, simultaneously with audio processing, sub-Q data in user data to be digitally input, synchronizing the sub-Q data with audio data and then outputting the sub-Q data, the audio player comprising:
- a reproduction section;
- and
- a control section for controlling the reproduction section,
- wherein the reproduction section includes
- a data receiving section for extracting audio data and sub-Q data from input data,
- a sub-Q data table for storing extracted sub-Q data,
- an audio data storage buffer for storing extracted audio data,
- an input processing section for managing storage of data into the sub-Q data table and the audio data storage buffer,
- an audio processing section for performing audio processing to the audio data stored in the audio data storage buffer, and
- a sub-Q data processing section for synchronizing the sub-Q data stored in the sub-Q data table with the audio data and then outputting the sub-Q data, and
- wherein the audio player has a function of automatically changing itself to a mode for outputting only the audio data when underflow of the sub-Q data table occurs.
Dependencies are inferred from the claim text.