Timeslot scheduling in digital audio and hybrid audio radio systems

• US 8,824,447 B2
• Filed: 05/03/2012
• Issued: 09/02/2014
• Est. Priority Date: 05/25/2007
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: Arad, Oren, Sharma, Sridhar, Waxman, Shay, Bydeley, David
• Primary Examiner(s): JAIN, RAJ K
• Application Number:
  US13/463,725
• Publication Number:
  US 20120213217A1
• Time in Patent Office: 852 Days
• Field of Search: 370/204, 370/206, 370/208, 370/315, 370/319, 370/321, 370/347
• US Class Current: 370/347
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/22 using time-division multiplexing

Abstract

Systems and methods of decoding data streams and conserving power are described. In some embodiments, a stream of data containing audio and other data is divided into a plurality of timeslots. A first timeslot of the plurality of timeslots is allocated to a first service. A grant allocation message which indicates a location of the first timeslot allocated to the first service is generated. The grant allocation message and the plurality of timeslots are transmitted to a receiver. The transmission system and receiver may be compatible with NRSC-5. The receiver may receive and decode the grant allocation message to identify OFDM symbols that carry information regarding the first service. The receiver may also receive the plurality of timeslots. The receiver may set a power mode of a component during OFDM symbols that indicate a status of the first service.

Claims

1. A radio receiver, the radio receiver comprising:

a tuner; and

digital signal processing hardware (DSPHW) communicatively coupled with the tuner, the DSPHW configured to;

configure the tuner to tune to a primary carrier frequency,

configure the tuner to tune to a secondary carrier frequency during an interval of consecutive inactive timeslots on a primary channel associated with the primary carrier frequency, and

demodulate and decode digital data transmitted over a secondary channel associated with the secondary carrier frequency.

2. The radio receiver of claim 1, wherein the primary carrier frequency and the secondary carrier frequency are in a predetermined radio frequency band.

3. The radio receiver of claim 1, wherein the primary carrier frequency and the secondary carrier frequency are different frequencies.

4. The radio receiver of claim 3, wherein the secondary channel carries a different kind of communication signal than the primary channel.

5. The radio receiver of claim 3, wherein the primary channel is a first hybrid FM signal and the secondary channel is a second hybrid FM signal.

6. The radio receiver of claim 3, wherein the primary channel is a hybrid FM signal and the secondary channel is an analog FM signal, the secondary channel carrying a DirectBand digital signal.

7. The radio receiver of claim 3, wherein the DSPHW is further configured to:

configure the tuner to tune to the primary carrier frequency after the interval of consecutive inactive timeslots, and

configure the tuner to tune to the primary carrier frequency after an amount of data is collected from the secondary channel.

8. The radio receiver of claim 1 further comprising:

one or more analog to digital converters (ADC).

9. A method of operating a radio receiver, the method comprising:

configuring a tuner to tune to a primary carrier frequency;

configuring the tuner to tune to a secondary carrier frequency during an interval of consecutive inactive timeslots on a primary channel associated with the primary carrier frequency; and

demodulating and decoding digital data transmitted over a secondary channel associated with the secondary carrier frequency.

10. The method of claim 9, wherein the primary carrier frequency and the secondary carrier frequency are different frequencies.

11. The method of claim 10, wherein the secondary channel carries a different kind of communication signal than the primary channel.

12. The method of claim 10, wherein the primary channel is a first hybrid FM signal and the secondary channel is a second hybrid FM signal.

13. The method of claim 10, wherein the primary channel is a hybrid FM signal and the secondary channel is an analog FM signal, the secondary channel carrying a DirectBand digital signal.

14. The method of claim 10 further comprising:

configuring the tuner to tune to the primary carrier frequency after the interval of consecutive inactive timeslots; and

configuring the tuner to tune to the primary carrier frequency after an amount of data is collected from the secondary channel.

15. A non-transitory computer-readable storage medium having embodied thereon a program, the program, when executed by a processor associated with a radio receiver, causes the processor to:

configure a tuner to tune to a primary carrier frequency;

configure the tuner to tune to a secondary carrier frequency during an interval of consecutive inactive timeslots on a primary channel associated with the primary carrier frequency; and

demodulate and decode digital data transmitted over a secondary channel associated with the secondary carrier frequency.

16. The non-transitory computer-readable storage medium of claim 15, wherein the primary carrier frequency and the secondary carrier frequency are different frequencies.

17. The non-transitory computer-readable storage medium of claim 16, wherein the secondary channel carries a different kind of communication signal than the primary channel.

18. The non-transitory computer-readable storage medium of claim 16, wherein the primary channel is a first hybrid FM signal and the secondary channel is a second hybrid FM signal.

19. The non-transitory computer-readable storage medium of claim 16, wherein the primary channel is a hybrid FM signal and the secondary channel is an analog FM signal, the secondary channel carrying a DirectBand digital signal.

20. The non-transitory computer-readable storage medium of claim 16 wherein the program, when executed, further causes the processor to:

configure the tuner to tune to the primary carrier frequency after the interval of consecutive inactive timeslots; and

configure the tuner to tune to the primary carrier frequency after an amount of data is collected from the secondary channel.