Compressed audio data format and file system structures

• US 6,353,173 B1
• Filed: 10/07/1999
• Issued: 03/05/2002
• Est. Priority Date: 06/17/1999
• Status: Expired due to Fees

• Current Assignee: Sonic Solutions (Adeia Inc.)
• Original Assignee: ROXIO Incorporated (MelodyVR Group Plc)
• Inventors: D'Amato, Andrea, Berhan, Michel D.
• Primary Examiner(s): Fletcher, Marlon T.
• Application Number:
  US09/414,379
• Time in Patent Office: 880 Days
• Field of Search: 846/01--02, 846/09, 846/49, 369/32-33, 369/47-- 4, 369/52.1, 369/93-95, 369/272, 369/275.1, 369/275.2, 369/275.3, 369/280
• US Class Current: 84/609
• CPC Class Codes: G10H 1/0041 in coded form
• CPC Class Codes: G10H 2250/571 Waveform compression, adapted for music synthesisers, sound banks or wavetables audio compression G10L19/00
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/329 on a disc [VTOC]

Abstract

A method for writing compressed audio data to a compact disc media is provided. The method includes selecting songs to be written in a session and reserving a first track. After the first is reserved, the method proceeds to writing a first temporary data structure and audio data to a second track following the first track. After the second track is closed, part of first temporary data structure (e.g., the recompiled INFO.CD3 part) is written to the reserved first track and the session is closed. Another method includes beginning a session writing the compressed audio data to the compact disc media. A track that includes a file system and an audio data section is then written. The writing of the track further includes writing an INFO.CD3 file, writing an ISO file system, and writing a FILEINFO.LC file following the ISO file system. Once the audio data section is written, the method proceeds to closing the track and closing the session.

Claims

1. A method for writing compressed audio data to a compact disc media, comprising:

selecting songs to be written in a session;

reserving a first track;

writing a first temporary data structure and audio data to a second track following the first track;

closing the second track;

writing at least part of the first temporary data structure to the reserved first track;

the writing including,

writing an INFO file in a CD3 directory in a first sector of the second track; and

closing the session.

2. A method for writing compressed audio data to a compact disc media as recited in claim 1, wherein writing the first temporary data structure further comprises:

writing a FILEINFO.LC file in a CD3 directory in sectors following the first sector of the second track; and

writing zeros to fill-in a remainder of a sector containing at least part of the FILEINFO.LC file.

3. A method for writing compressed audio data to a compact disc media as recited in claim 2, wherein the INFO.CD3 file contains a CD3 music CD identification, an album identification and pointers to the FILEINFO.LC files.

4. A method for writing compressed audio data to a compact disc media as recited in claim 3, wherein the INFO.CD3 file is one sector long.

5. A method for writing compressed audio data to a compact disc media as recited in claim 2, wherein the writing of the FILEINFO.LC file further comprises:

writing a variable length data structure to define the FILEINFO.LC file, the variable length data structure contains information about the audio data that follows the FILEINFO.LC file.

6. A method for writing compressed audio data to a compact disc media as recited in claim 2, wherein the FILENINFO.LC has an LC extension that defines a language code.

7. A method for writing compressed audio data to a compact disc media as recited in claim 2, wherein the first temporary data structure is not written to the reserved first track and before the session is closed, the method further comprises:

writing a third track following the second track, the writing of the third track includes;

writing a second temporary data structure, the second temporary data structure being recompiled to incorporate the first temporary data structure;

writing audio data for the third track;

closing the third track

writing at least part of the second temporary data structure that is recompiled to incorporate the first temporary data structure to the reserved first track; and

closing the session.

8. A method for writing compressed audio data to a compact disc media as recited in claim 7, wherein the first and second temporary data structures are not written to the reserved first track and before the session is closed, the method further comprises:

writing a fourth track following the third track, the writing of the fourth track includes;

writing a third temporary data structure, the third temporary data structure being recompiled to incorporate the first temporary data structure and the second temporary data structure;

writing audio data for the fourth track;

closing the fourth track

writing at least part of the third temporary data structure that is recompiled to incorporate the first and second temporary data structures to the reserved first track; and

closing the session.

9. A method for writing compressed audio data to a compact disc media as recited in claim 2, wherein when the first temporary data structure is written to the reserved first track, the method includes,

writing INFO.CD3 file to a sector 15 of the first track;

writing a file system beginning at a sector 16 of the first track.

10. A method for writing compressed audio data to a compact disc media as recited in claim 9, wherein the INFO.CD3 file incorporates a pointer to the FILEINFO.LC file.

11. A method for writing compressed audio data to a compact disc media as recited in claim 9, wherein the file system incorporates a pointer to the INFO.CD3 file and the FILEINFO.LC file.

12. A method for writing compressed audio data to a compact disc media as recited in claim 2, wherein the INFO.CD3 and the FILINFO.LC files define a microcontroller system structure (MSS) that is independently accessible to a microcontroller-based player.

13. A method for writing compressed audio data to a compact disc media as recited in claim 2, wherein the FILEINFO.LC file incorporates pointers to audio files, image files, and lyrics files.

14. A computer readable media having program instructions for writing compressed audio data to a compact disc media, the operations of the computer readable media comprise:

program instructions for selecting songs to be written in a session;

program instructions for reserving a first track;

program instructions for writing a first temporary data structure and audio data to a second track following the first track;

program instructions for closing the second track;

program instructions for writing at least part of the first temporary data structure to the reserved first track, the program instructions including;

program instructions for writing an INFO file in a CD3 directory in a first sector of the second track; and

program instructions for closing the session.

15. A computer readable media having program instructions for writing compressed audio data to a compact disc media as recited in claim 14, wherein the program instructions for writing the first temporary data structure further comprise:

program instructions for writing a FILEINFO.LC file in a CD3 directory in sectors following the first sector of the second track; and

program instructions for writing zeros to fill-in a remainder of a sector containing at least part of the FILEINFO.LC file.

16. A computer readable media having program instructions for writing compressed audio data to a compact disc media as recited in claim 15, wherein the INFO.CD3 file contains a CD3 music CD identification, an album identification and pointers to the FILEINFO.LC files.

17. A computer readable media having program instructions for writing compressed audio data to a compact disc media as recited in claim 16, wherein the INFO.CD3 file is one sector long.

18. A computer readable media having program instructions for writing compressed audio data to a compact disc media as recited in claim 15, wherein the writing of the FILEINFO.LC file further comprises:

program instructions for writing a variable length data structure to define the FILEINFO.LC file, the variable length data structure contains information about the audio data that follows the FILEINFO.LC file.

19. A computer readable media having program instructions for writing compressed audio data to a compact disc media as recited in claim 15, wherein the FILEINFO.LC has an LC extension that defines a language code.

20. A computer readable media having program instructions for writing compressed audio data to a compact disc media as recited in claim 15, wherein the first temporary data structure is not written to the reserved first track and before the session is closed, the program instructions further comprise:

program instructions for writing a third track following the second track, the program instructions for writing of the third track includes;

program instructions for writing a second temporary data structure, the second temporary data structure being recompiled to incorporate the first temporary data structure;

program instructions for writing audio data for the third track;

program instructions for closing the third track

program instructions for writing at least part of the second temporary data structure that is recompiled to incorporate the first temporary data structure to the reserved first track; and

program instructions for closing the session.

21. A computer readable media having program instructions for writing compressed audio data to a compact disc media as recited in claim 20, wherein the first and second temporary data structures are not written to the reserved first track and before the session is closed, the method further comprises:

program instructions for writing a fourth track following the third track, the writing of the fourth track includes;

program instructions for writing a third temporary data structure, the third temporary data structure being recompiled to incorporate the first temporary data structure and the second temporary data structure;

program instructions for writing audio data for the fourth track;

program instructions for closing the fourth track

program instructions for writing at least part of the third temporary data structure that is recompiled to incorporate the first and second temporary data structures to the reserved first track; and

program instructions for closing the session.