Broadcast receiver and method of processing data

• US 8,136,011 B2
• Filed: 07/07/2008
• Issued: 03/13/2012
• Est. Priority Date: 07/06/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Cho, Il Soo, Cho, Hyeon Cheol, Park, Jong Sun, Choi, In Hwan, Lee, Hyoung Gon, Song, Won Gyu, Kim, Seung Man, Kim, Jin Woo, Kwak, Kook Yeon, Kim, Byoung Gill
• Primary Examiner(s): Alphonse, Fritz
• Application Number:
  US12/168,864
• Publication Number:
  US 20090044073A1
• Time in Patent Office: 1,345 Days
• Field of Search: 714/758, 714/784, 714/752, 714/776, 714/755, 714/746
• US Class Current: 714/758
• CPC Class Codes: G01C 21/3688 Systems comprising multiple parts or multiple output devices (not client-server), e.g. detachable faceplates, key fobs or multiple output screens
• CPC Class Codes: G10L 13/00 Speech synthesis; Text to speech systems
• CPC Class Codes: H03M 13/09 Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
• CPC Class Codes: H03M 13/271 Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations
• CPC Class Codes: H03M 13/2721 the interleaver involves a diagonal direction, e.g. by using an interleaving matrix with read-out in a diagonal direction
• CPC Class Codes: H03M 13/2921 wherein error correction coding involves a diagonal direction
• CPC Class Codes: H03M 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H03M 13/2945 using at least three error correction codes H03M13/2957 takes precedence
• CPC Class Codes: H03M 13/356 Unequal error protection [UEP]
• CPC Class Codes: H04H 2201/30 characterised by the use of a return channel, e.g. for collecting users' opinions, for returning broadcast space/time information or for requesting data
• CPC Class Codes: H04H 60/13 Arrangements for device control affected by the broadcast information
• CPC Class Codes: H04H 60/51 of receiving stations
• CPC Class Codes: H04H 60/81 characterised by the transmission system itself
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04N 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/2362 Generation or processing of Service Information [SI]
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• 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 21/41422 : located in transportation means, e.g. personal vehicle arrangements specially adapted for transportation systems in broadcast systems H04H20/62
• CPC Class Codes: H04N 21/4345 : Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/4381 : Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• 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 21/440236 : by media transcoding, e.g. video is transformed into a slideshow of still pictures, audio is converted into text
• CPC Class Codes: H04N 21/6131 : involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/8126 : involving additional data, e.g. news, sports, stocks, weather forecasts
• CPC Class Codes: H04N 21/814 : comprising emergency warnings arrangements specially adapted for emergency or urgency in broadcast systems H04H20/59; arrangements for providing alarms, notifications, alerts to substation in data switching networks H04L12/1895

Abstract

A broadcast receiver and a method of processing data are disclosed. The broadcast receiver includes a signal receiving unit, a RS frame decoder, a decoding unit, a text-to-speech (TTS) module, a voice output unit, and a control unit. The signal receiving unit receives broadcast signal multiplexed mobile broadcast service data including text information and main broadcast service data. The RS frame decoder performs decoding on the RS frame, thereby correcting errors occurred in the corresponding mobile broadcast service data. The decoding unit decodes the text information included in the error-corrected mobile broadcast service data. The text-to-speech (TTS) module converts the text information to a voice signal. The voice output unit outputs the converted voice signal. The control unit controls the voice output unit.

Claims

1. A broadcast receiver, comprising:

a signal receiving unit for receiving a broadcast signal including mobile service data and main service data, wherein a Reed-Solomon (RS) frame includes at least one data packet corresponding to the mobile service data, an RS parity generated based upon the mobile service data, and a Cyclic Redundancy Check (CRC) checksum generated based upon the mobile service data and the RS parity;

a RS frame decoder for performing CRC-decoding and RS-decoding on the RS frame in order to correct errors that occurred in the corresponding mobile service data;

a decoding unit for decoding text information included in the error-corrected mobile service data and outputting the decoded text information;

a text-to-speech (TTS) module for converting the output text information to a voice signal;

a voice output unit for outputting the voice signal; and

a control unit for controlling the voice output unit and the TTS module.

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

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

a telecommunication module for communicating with a domestic carrier located at a remote site via a wireless telecommunication network and transmitting the current position information to the domestic carrier.

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

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

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

a known sequence detector for detecting at least one of known data sequence; and

a channel equalizer for channel-equalizing the mobile service data using the detected at least one known data sequence.

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

a transmission parameter detector for detecting a transmission parameter inserted in a predetermined position within at least one data group that configures the RS frame; and

a power controller for controlling power based upon the detected transmission parameter in order to receive a data group including requested mobile service data.

6. The broadcast receiver of claim 5, further comprising:

a block decoder for symbol-decoding the mobile service data in block units based upon the detected transmission parameter.

7. The broadcast receiver of claim 1, wherein the TTS module comprises:

a language processor for analyzing and pre-processing the decoded text information;

a voice database (DB) for storing voice data corresponding to linguistic characters; and

a voice processor for matching the pre-processed text information output from the language processor with the stored voice data of the voice DB in order to convert the text information to voice signals.

8. The broadcast receiver of claim 1, wherein the TTS module selectively converts the output text information under control of the control unit.

9. The broadcast receiver of claim 1, wherein, when an external event occurs, the control unit controls the voice output unit to output the voice signal based upon priority levels of the voice signal.

10. A method of processing data in a broadcast receiver, the method comprising:

receiving a broadcast signal including mobile service data and main service data, wherein a Reed-Solomon (RS) frame includes at least one data packet corresponding to the mobile service data, an RS parity generated based upon the mobile service data, and a Cyclic Redundancy Check (CRC) checksum generated based upon the mobile service data and the RS parity;

performing CRC-decoding and RS-decoding on the RS frame in order to correct errors that occurred in the corresponding mobile service data;

decoding text information included in the error-corrected mobile service data;

outputting the decoded text information;

converting the outputted text information to a voice signal; and

outputting the voice signal.

11. The method of claim 10, further comprising:

detecting at least one known data sequence; and

channel-equalizing the mobile service data using the detected at least one known data sequence.

12. The method of claim 10, further comprising:

detecting a transmission parameter inserted in a predetermined position within at least one data group that configures the RS frame; and

controlling power based upon the detected transmission parameter in order to receive a data group including requested mobile service data.

13. The method of claim 12, further comprising:

symbol-decoding the mobile service data in block units based upon the detected transmission parameter.

14. The method of claim 11, further comprising:

performing at least carrier recovery or timing recovery using the detected at least one known data sequence.

15. The method of claim 10, further comprising:

decoding the mobile service data in block units.