Image display apparatus, mobile terminal and method for operating the same

• US 9,398,344 B2
• Filed: 03/15/2013
• Issued: 07/19/2016
• Est. Priority Date: 06/08/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seokhee, Hwang, Sunjung, Lee, Myonggu, Shin, Sungho, Hong, Seongpyo, Jeong, Youngho
• Primary Examiner(s): Dang, Hung
• Assistant Examiner(s): Park, Sunghyoun
• Application Number:
  US13/840,366
• Publication Number:
  US 20130330053A1
• Time in Patent Office: 1,222 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04N 21/41265 having a remote control device for bidirectional communication between the remote control device and client device unidirectional remote control device H04N21/42204
• CPC Class Codes: H04N 21/47 End-user applications
• CPC Class Codes: H04N 21/4852 for modifying audio parameters, e.g. switching between mono and stereo
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/6437 Real-time Transport Protocol [RTP]
• CPC Class Codes: H04N 21/8113 comprising music, e.g. song in MP3 format

Abstract

An image display apparatus, a mobile terminal and a method for operating the same are discussed. The method for operating the image display apparatus includes entering a wireless audio transmission mode, performing synchronization with a mobile terminal using a first wireless communication method, extracting audio data from multimedia data, and transmitting the extracted audio data to the mobile terminal using a second wireless communication method different from the first wireless communication method. By this configuration, it is possible to improve user convenience.

Claims

1. A method for operating an image display apparatus, the method comprising:

receiving a wireless audio transmission mode entrance signal from a mobile terminal;

transmitting information about audio data to be transmitted to the mobile terminal;

receiving decoding information from the mobile terminal;

transmitting audio data of an encoding state corresponding to the decoding information; and

playing back multimedia data associated with the audio data,

wherein, if wireless channel environment information between the mobile terminal and the image display apparatus or playback delay information of the mobile terminal is received during multimedia data playback, performing signal processing such that the multimedia data playback is synchronized with audio data playback of the mobile terminal based on the wireless channel environment information or the playback delay information.

2. The method according to claim 1, wherein the information about the audio data includes at least one of information about the number of channels, encoding state information, encoding scheme information, playback point-of-time information and current time information of the audio data to be transmitted.

3. The method according to claim 1, wherein the transmitting of the audio data includes:

transmitting audio data demultiplexed from the multimedia data and not decoded if the decoding information indicates that the audio data can be decoded; and

transmitting the audio data demultiplexed from the multimedia data and decoded if the decoding information indicates that the audio data cannot be decoded.

4. The method according to claim 1, wherein:

the reception of the wireless audio transmission mode entrance signal, the transmission of the information about the audio data and the reception of the decoding information are performed based on a first wireless communication method, and

the transmission of the audio data is performed based on a second wireless communication method different from the first wireless communication method.

5. The method according to claim 1, wherein the performing signal processing such that the multimedia data playback is synchronized with audio data playback of the mobile terminal comprises at least one of:

based on the wireless channel environment information or the playback delay information,

changing the number of channels of the transmitted audio data;

delaying a playback time of the multimedia data; and

changing an encoding state of the audio data to be transmitted.

6. A method for operating a mobile terminal, the method comprising:

transmitting a wireless audio transmission mode entrance signal to an image display apparatus;

receiving information about audio data to be transmitted from the image display apparatus;

transmitting decoding information indicating whether audio data to be received can be decoded to the image display apparatus based on information about the audio data;

receiving audio data of an encoding state corresponding to the decoding information from the image display apparatus; and

playing back the received audio data,

wherein, if wireless channel environment information between the mobile terminal and the image display apparatus or playback delay information of the mobile terminal is received to the image display apparatus during multimedia data playback, the image display apparatus performs signal processing such that the multimedia data playback is synchronized with audio data playback of the mobile terminal based on the wireless channel environment information or the playback delay information.

7. The method according to claim 6, wherein the receiving the audio data of the encoding state corresponding to the decoding information includes:

receiving audio data demultiplexed from the multimedia data and not decoded if the decoding information indicates that the audio data can be decoded; and

receiving audio data demultiplexed from the multimedia data and decoded if the decoding information indicates that the audio data cannot be decoded.

8. An image display apparatus comprising:

a display;

a network interface to exchange data with a mobile terminal; and

a controller to transmit information about audio data to be transmitted to the mobile terminal if a wireless audio transmission mode entrance signal is received from the mobile terminal, to transmit audio data of an encoding state corresponding to decoding information if the decoding information is received from the mobile terminal, and to play back multimedia data associated with the audio data,

wherein, if wireless channel environment information between the mobile terminal and the image display apparatus or playback delay information of the mobile terminal is received during multimedia data playback, the controller performs signal processing such that the multimedia data playback is synchronized with audio data playback of the mobile terminal based on the wireless channel environment information or the playback delay information.

9. The image display apparatus according to claim 8, wherein the controller performs at least one of an operation for changing the number of channels of the audio data to be transmitted, an operation for delaying a playback time of the multimedia data and an operation for changing an encoding state of the audio data to be transmitted.

10. A mobile terminal comprising:

an audio output module to output an audio signal to be played back;

a wireless communication unit to exchange data with an image display apparatus; and

a controller to transmit a wireless audio transmission mode entrance signal to the image display apparatus, to transmit decoding information indicating whether audio data to be received can be decoded to the image display apparatus based on information about audio data if the information about the audio data is received from the image display apparatus, and to play back the received audio data if audio data of an encoding state corresponding to the decoding information is received from the image display apparatus,

wherein, if wireless channel environment information between the mobile terminal and the image display apparatus or playback delay information of the mobile terminal is received to the image display apparatus during multimedia data playback, the controller controls the image display apparatus to perform signal processing such that the multimedia data playback is synchronized with audio data playback of the mobile terminal based on the wireless channel environment information or the playback delay information.

11. The mobile terminal according to claim 10, wherein the controller calculates playback delay information of the audio data, transmits wireless channel environment information between the mobile terminal and the image display apparatus or the playback delay information to the image display apparatus, and plays back the audio data if the audio data corresponding to the wireless channel environment information or the playback delay information is received.