Method and apparatus of processing audio of multimedia playback terminal

• US 20060259618A1
• Filed: 05/16/2006
• Published: 11/16/2006
• Est. Priority Date: 05/16/2005
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Sung Lim
• Application Number:
  US11/435,263
• Publication Number:
  US 20060259618A1
• Time in Patent Office: Days
• US Class Current: 709/224
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04M 1/72442 for playing music files
• CPC Class Codes: H04N 21/43072 of multiple content streams on the same device
• CPC Class Codes: H04N 21/4396 by muting the audio signal
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/6375 for requesting retransmission , e.g. of data packets lost or corrupted during transmission from serverARQ protocols H04L1/18; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

Abstract

An apparatus and method of processing audio are provided. In order to achieve synchronization between video and audio in a multimedia playback terminal, the apparatus of processing audio includes: a receiver storing audio data received through a wireless communications network, and providing audio data upon request; and a decoder decoding and outputting the audio data provided from the receiver, and outputting a silence signal when loss of the audio data occurs.

Claims

1. A method of processing audio, the method comprising:

receiving audio data on packet basis through a multimedia service network;

determining whether or not the received audio packet data is lost;

decoding and converting the corresponding audio packet data into an analog audio signal when the determination results shows that the audio packet is a normal audio packet; and

outputting silence in a playback section of the corresponding audio packet when the determination results shows that the audio packet loss has occurred.

2. The method according to claim 1, wherein when the audio packet loss occurs, a normal audio packet previously backed up is provided to a decoder.

3. The method according to claim 1, wherein when the audio packet loss occurs, silence audio data is provided to a digital/analog converter instead of decoder output, and thus silence is outputted in a playback section of the corresponding audio packet.

4. The method according to claim 1, wherein information on whether or not the audio packet loss occurs is provided to an audio player port from an RTP layer.

5. The method according to claim 1, wherein lost time information is recovered by calculating in the RTP layer, playtime information corresponding to the lost audio packet and providing the information to an audio player port.

6. An apparatus of processing audio, comprising:

a receiver storing audio data received through a wireless communications network, and providing audio data upon request; and

a decoder decoding and outputting the audio data provided from the receiver, and outputting a silence signal when loss of the audio data occurs.

7. The apparatus according to claim 6, wherein the receiver comprises:

a memory storing the audio data on packet basis; and

a reception controller transmitting to the decoder, the audio data and information on a lost audio packet.

8. The apparatus according to claim 6, wherein the decoder comprises:

an input buffer receiving audio data from the receiver;

a decoder decoding the audio data of the input buffer,

a digital/analog converter digital/analog converting PCM data decoded by the decoder, and

a decoding controller controlling the input buffer, the decoder, and the digital/analog converter.

9. The apparatus according to claim 8, wherein when audio packet loss occurs, the decoding controller transmits backup audio packet to the input buffer.

10. The apparatus according to claim 8, wherein when audio packet loss occurs, the decoding controller inputs PCM data outputted as silence to the digital/analog converter.

11. The apparatus according to claim 10, further comprising an output buffer receiving and providing the PCM data outputted as silence to the digital/analog converter.

12. A method of processing audio, the method comprising:

receiving audio data on packet basis through a wireless communications network;

determining whether or not the audio data is lost; and

outputting a silence signal when the audio data is lost by decoding another audio data previously backed up instead of the lost audio data.

13. The method according to claim 12, further comprising inputting PCM data having a silence signal to a digital/analog converter when the audio data is lost.