Method and Apparatus for Store and Replay Functions in a Digital Radio Broadcasting Receiver

• US 20090070597A1
• Filed: 07/31/2008
• Published: 03/12/2009
• Est. Priority Date: 12/22/2006
• Status: Active Grant

• Current Assignee: iBiquity Digital Corporation (Adeia Inc.)
• Original Assignee: iBiquity Digital Corporation (Adeia Inc.)
• Inventors: Parimi, Nandu, Pahuja, Ashwini, Shah, Chinmay
• Granted Patent: US 8,520,852 B2
• Time in Patent Office: Days
• US Class Current: 713/189
• CPC Class Codes: H04H 20/31 using in-band signals, e.g. subsonic or cue signal
• CPC Class Codes: H04H 60/27 Arrangements for recording or accumulating broadcast information or broadcast-related information
• CPC Class Codes: H04H 60/47 for recognising genres

Abstract

A method includes: receiving a plurality of audio frames, assembling groups of the audio frames into logical recording units, storing a plurality of the logical recording units, retrieving the stored logical recording units, and decoding the retrieved logical recording units. An apparatus that performs the method is also provided.

Claims

1. A method comprising:

receiving a plurality of audio frames;

assembling groups of the audio frames into logical recording units;

storing a plurality of the logical recording units;

retrieving the stored logical recording units; and

decoding the retrieved logical recording units.

2. The method of claim 1, further comprising:

encrypting the logical recording units prior to the storing step; and

decrypting the logical recording units following the retrieving step.

3. The method of claim 2, wherein the logical recording units are encrypted using a radio identification tag.

4. The method of claim 1, wherein the audio frames comprise:

a core packet length field;

an enhanced packet length field;

a core packet field; and

an enhanced packet field.

5. The method of claim 1, wherein the logical recording units comprise:

a header; and

a program specific data packet.

6. The method of claim 1, wherein the logical recording units comprise a header including:

a logical recording unit marker field;

a logical recording unit length field;

a logical recording unit number field;

a packets/logical recording unit field;

a codec mode field;

a number of streams field;

an audio level field;

an audio processing field;

an encryption type field; and

a program specific data length field.

7. The method of claim 1, wherein the audio frames include core packets and enhanced packets.

8. The method of claim 7, further comprising:

separating the core packets and the enhanced packets; and

aligning the core packets and the enhanced packets.

9. The method of claim 1, wherein each logical recording unit includes five audio frames.

10. An apparatus comprising:

an input for receiving a plurality of audio frames;

a baseband processing system for assembling groups of the audio frames into logical recording units;

a host system for storing a plurality of the logical recording units and retrieving the stored logical recording units; and

wherein the baseband processing system decodes the retrieved logical recording units.

11. The apparatus of claim 10, wherein the baseband processing system encrypts the logical recording units for delivery to the host, and decrypts the logical recording retrieved from the host.

12. The apparatus of claim 11, wherein the logical recording units are encrypted using a radio identification tag.

13. The apparatus of claim 10, wherein the audio frames comprise:

a core packet length field;

an enhanced packet length field;

a core packet field; and

an enhanced packet field.

14. The apparatus of claim 10, wherein the logical recording units comprise:

a header; and

a program specific data packet.

15. The apparatus of claim 10, wherein the logical recording units comprise a header including:

a logical recording unit marker field;

a logical recording unit length field;

a logical recording unit number field;

a packets/logical recording unit field;

a codec mode field;

a number of streams field;

an audio level field;

an audio processing field;

an encryption type field; and

a program specific data length field.

16. The apparatus of claim 10, wherein the audio frames include core packets and enhanced packets.

17. The apparatus of claim 16, wherein the baseband system separates the core packets and the enhanced packets;

and

aligns the core packets and the enhanced packets.

18. The apparatus of claim 10, wherein each logical recording unit includes five audio frames.