# US 8,050,155 B2 · Disc playback apparatus

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- Number: US 8,050,155 B2
- Document ID: US8050155B2
- Status: Granted
- Kind: B2
- Application number: 12/529,578
- Filed: 2007-11-22
- Published: 2010-04-08
- Granted: 2011-11-01
- Earliest claimed: 2007-03-15
- Assignees: Mitsubishi Electric Corporation
- Inventors: Akihito Takahashi
- Web page: https://patentgrep.com/patent/US8050155B2

## CPC

- G11B 20/1262: {with more than one format/standard, e.g. conversion from CD-audio format to R-DAT format}
- G11B 19/125: {involving the detection of carrier data format}
- G11B 20/10527: {Audio or video recording; Data buffering arrangements (G11B20/12 - G11B20/18 take precedence)}
- G11B 27/105: {of operating discs}
- G11B 27/3027: {used signal is digitally coded}
- G11B 2020/0005: {DTS audio codecs}
- G11B 2020/10555: {wherein the frequency, the amplitude, or other characteristics of the audio signal is taken into account}
- G11B 2020/10601: {surround sound signal}
- G11B 2220/2545: CDs
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A disc playback apparatus includes a decoder 15 for decoding audio files respectively corresponding to different data formats, which are stored in a storage unit, on the basis of a file attribute preset thereto, and for playing back the decoded audio files, and a control unit 16 for determining a file attribute of data read from the storage unit when starting the decoding and playback process on a basis of the file attribute set to the decoder, and for, when the file attribute differs from the file attribute set to the decoder, holding address information about the read data, and, after stopping the reading of subsequent data, changing the setting of the file attribute made for the decoder and then restarting to read the data by using the address information held thereby.

## Claims

### Claim 1

A disc playback apparatus characterized in comprising:
a data processing unit for reading at least two audio files recorded in a disc, the audio files having different data formats, and converting the audio files into digital data to store them in a storage unit;
a decoder for decoding the audio files respectively corresponding to said data formats, which are stored in said storage unit, on a basis of a file attribute preset thereto, and playing back the decoded audio files; and
a control unit for reading data stored in the said storage unit and delivering the data to said decoder, for determining a file attribute of said read data when starting said decoding and playback process on a basis of the file attribute set to said decoder, and for, when the file attribute differs from the file attribute set to said decoder, holding address information about said read data, and, after stopping reading of subsequent data, changing the setting of the file attribute made for said decoder and then restarting to read said data by using said address information held thereby.

### Claim 2 (depends on 1)

The disc playback apparatus according to claim 1, characterized in that said control unit performs a process of changing a setting of a file attribute of an audio file having a same extension on said decoder.

### Claim 3 (depends on 1)

The disc playback apparatus according to claim 1, characterized in that said control unit includes:
a data read control unit for reading data stored in said storage unit and then delivering the data to said decoder, and for reading data from said storage unit;
a file attribute determining unit for referring to header information about said read data to determine a file attribute of a file recorded in said disc;
an address information holding unit for holding the address information about said read data when said determined file attribute differs from the file attribute preset to said decoder; and
a playback control unit for performing a mute playback when the file attribute determined by said file attribute determining unit differs from the file attribute preset to said decoder, for changing the setting of the file attribute made for said decoder after stopping the reading of the subsequent data by said data read control unit and then restarting to read said data by using the address information held by said address information holding unit, and for, when the file attribute determined by said file attribute determining unit is a same as the file attribute preset to said decoder, releasing the mute playback and starting an ordinary playback.

### Claim 4 (depends on 3)

The disc playback apparatus according to claim 3, characterized in that when said determined file attribute is a same as the preset file attribute, said playback control unit releases said mute playback and starts an ordinary playback.