BROADCAST RECEIVER AND METHOD OF PROCESSING DATA

• US 20090029671A1
• Filed: 07/07/2008
• Published: 01/29/2009
• Est. Priority Date: 07/06/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Cho, Hyeon Cheol, Kim, Seung Man, Park, Jong Sun, Cho, Il Soo, Kim, Byoung Gill, Lee, Hyoung Gon, Choi, In Hwan, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Granted Patent: US 8,160,536 B2
• Time in Patent Office: Days
• US Class Current: 455/345
• CPC Class Codes: G01C 21/34 Route searching; Route guidance
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/4424 Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used error monitoring in general G06F11/30; arrangements for monitoring conditions of receiving stations in broadcast systems H04H60/32; diagnosis, testing or measuring for television receivers H04N17/04
• CPC Class Codes: H04N 21/4436 Power management, e.g. shutting down unused components of the receiver power management in computer systems G06F1/3203; hibernate or awake process in computer systems G06F9/4418
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/64315 DVB-H
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

Abstract

A broadcast receiver and a method of processing data are disclosed. The broadcast receiver includes a signal receiving unit, a known sequence detector, and a channel equalizer. The signal receiving unit repeats, when an operating mode of the broadcast receiver has been switched to a Discontinuous Receive (DRx) mode, preset wake-up and sleep sections, and receives a broadcast signal containing main broadcast service and mobile broadcast service data in the wake-up section. The known sequence detector detects known data included in the received broadcast signal. The channel equalizer uses the detected known data, thereby channel-equalizing the received mobile broadcast service data.

Claims

1. A broadcast receiver, comprising:

a signal receiving unit for repeating, when an operating mode of the broadcast receiver has been switched to a Discontinuous Receive (DRx) mode, preset wake-up and sleep sections, and receiving a broadcast signal containing main broadcast service and mobile broadcast service data in the wake-up section;

a known sequence detector for detecting known data included in the received broadcast signal; and

a channel equalizer for using the detected known data, thereby channel-equalizing the received mobile broadcast service data,

wherein the mobile broadcast service data configures a data group, wherein the data group is divided into a plurality of regions, wherein N number of known data sequences are inserted in some regions among the plurality of regions within the data group, and wherein initialization data are inserted at a beginning portion of each known data sequence, the initialization data being used for initializing a memory included in a trellis encoder of a broadcast transmitting system.

2. The broadcast receiver of claim 1, further comprising:

a controller for switching, when ignition of a vehicle in which the broadcast receiver is mounted is turned off, the operating mode of the broadcast receiver to the DRx mode and performing a control operation for supplying power to the signal receiving unit.

3. The broadcast receiver of claim 2, further comprising:

a vehicle network unit for detecting whether an ignition of the vehicle is turned on or off and generating an ignition-off message when the ignition of the vehicle is turned off; and

a transceiver for outputting the ignition-off message generated by the vehicle network unit to the controller or outputting a vehicle control signal from the controller to the vehicle network unit,

wherein, when the ignition-off message is received, the controller switches the operating mode of the broadcast receiver to the DRx mode to receive a broadcast signal even when the ignition of the vehicle is off.

4. The broadcast receiver of claim 2, wherein, in the DRx mode, the controller controls a vehicle equipped with the broadcast receiver during at least one of a vehicle power off section and a vehicle power on section, based upon the type of the received mobile broadcast service data.

5. The broadcast receiver of claim 1, wherein the wake-up cycle period varies based upon the type of the received mobile broadcast service data, the wake-up cycle period is configured of a repetition of wake-up sections and sleep sections.

6. The broadcast receiver of claim 1, further comprising:

a position information module for searching and generating a current position information of the broadcast receiver; and

a navigation unit for performing at least one of travel route search, map matching, and travel route guidance by using the generated current position information and a map information.

7. The broadcast receiver of claim 1, further comprising:

a RS frame decoder for performing CRC-decoding and RS-decoding on the mobile broadcast service data, thereby correcting errors occurred in the mobile broadcast service data.

8. The broadcast receiver of claim 1, further comprising:

a transmission parameter detector for detecting transmission parameters inserted in a predetermined positions within each of the data group; and

a power controller for controlling power based upon the detected transmission parameters, thereby receiving a data group including requested mobile broadcast service data.

9. A method for processing data in a broadcast receiver, comprising:

repeating, when an operating mode of the broadcast receiver has been switched to a Discontinuous Receive (DRx) mode, preset wake-up and sleep sections, and receiving a broadcast signal containing main broadcast service and mobile broadcast service data in the wake-up section;

detecting known data included in the received broadcast signal; and

channel-equalizing the received mobile broadcast service data using the detected known data,

wherein the mobile broadcast service data configures a data group, wherein the data group is divided into a plurality of regions, wherein N number of known data sequences are inserted in some regions among the plurality of regions within the data group, and wherein initialization data are inserted at a beginning portion of each known data sequence, the initialization data being used for initializing a memory included in a trellis encoder of a broadcast transmitting system.

10. The method of claim 9, further comprising:

switching, when ignition of a vehicle in which the broadcast receiver is mounted is turned off, the operating mode of the broadcast receiver to the DRx mode and performing a control operation for supplying power to enable reception of broadcast signal in the DRx mode.

11. The method of claim 9, further comprising:

controlling a vehicle equipped with the broadcast receiver during at least one of a vehicle power off section and a vehicle power on section, based upon the type of the received mobile broadcast service data in the DRx mode.

12. The method of claim 9, wherein the wake-up cycle period varies based upon the type of the received mobile broadcast service data, the wake-up cycle period is configured of a repetition of wake-up sections and sleep sections.

13. The method of claim 9, further comprising:

searching and generating a current position information of the broadcast receiver; and

performing at least one of travel route search, map matching, and travel route guidance by using the generated current position information and a map information.

14. The method of claim 9, further comprising:

performing CRC-decoding and RS-decoding on the mobile broadcast service data, thereby correcting errors occurred in the mobile broadcast service data.

15. The method of claim 9, further comprising:

detecting transmission parameters inserted in a predetermined positions within each of the data group; and

controlling power based upon the detected transmission parameters, thereby receiving a data group including requested mobile broadcast service data.