Intelligent codec selection to optimize audio transmission in wireless communications

• US 20060094472A1
• Filed: 12/14/2005
• Published: 05/04/2006
• Est. Priority Date: 04/03/2003
• Status: Abandoned Application

• Current Assignee: Core Mobility (Smith Micro Software Incorporated)
• Original Assignee: Core Mobility (Smith Micro Software Incorporated)
• Inventors: Othmer, Konstantin, Ruf, Michael P.
• Application Number:
  US11/300,522
• Publication Number:
  US 20060094472A1
• Time in Patent Office: Days
• US Class Current: 455/563
• CPC Class Codes: G10L 19/20 using sound class specific coding, hybrid encoders or object based coding
• CPC Class Codes: G10L 19/22 Mode decision, i.e. based on audio signal content versus external parameters
• CPC Class Codes: H04M 7/0072 Speech codec negotiation H04L65/1069 takes precedence
• CPC Class Codes: H04N 21/2368 Multiplexing of audio and video streams
• 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 21/4341 Demultiplexing of audio and video streams
• CPC Class Codes: H04N 21/4398 involving reformatting operations of audio signals details of audio signal transcoding G10L19/173
• CPC Class Codes: H04N 21/4621 Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen arrangements for using the results of monitoring on user's side in broadcast systems H04H60/65; flow control in packet networks H04L47/10
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements

Abstract

An optimal compressor/decompressor (codec) module is intelligently selected for use when transmitting audio from a mobile communication device to a recipient. The codec can be selected based on the type of the audio data or the characteristics of the recipient. The codec can also be selected based on whether the audio data is to be transmitted to the recipient in real time or recorded and transmitted asynchronously. Audio data that is to be transmitted to the recipient is encoded or compressed using the selected codec and then sent to the recipient. Selection of the codec in this manner permits the compression to be optimized in response to specific circumstances associated with the communication of the audio data between the sender device and the recipient. The codec can be selected during the communication in response to a tone or other data provided by the recipient.

Claims

1. In a wireless sender device operating in a wireless communication system in which audio data is compressed and transmitted from the sender device to a recipient, a method of selecting a codec for compressing the audio data, the method comprising:

receiving, at the sender device, audio data that is to be transmitted to an identified recipient;

selecting a codec from among a plurality of available codecs, wherein selecting the codec is based on at least one of the factors;

a type of the audio data;

characteristics of the recipient;

or

whether the audio data is to be transmitted to the recipient in real time or recorded and transmitted asynchronously;

compressing the audio data using the selected codec; and

transmitting the compressed audio data from the sender device to the recipient.

2. The method of claim 1, further comprising, prior to selecting the codec, obtaining information locally at the sender device regarding the characteristics of the recipient, such that the codec is selected based at least on the characteristics of the recipient.

3. The method of claim 2, wherein the information regarding the characteristics of the recipient is stored in a contacts list stored on the sender device, wherein the information regarding the characteristics of the recipient include a codec associated with the recipient.

4. The method of claim 3, further comprising obtaining the information regarding the characteristics of the recipient comprises receiving the information from a synchronization service.

5. The method of claim 2, wherein obtaining the information regarding the characteristics of the recipient comprises obtaining the information from a previous interaction between the sender device and the recipient.

6. The method of claim 5, further comprising obtaining the information from a previous interaction that includes a Voice over Internet (VoIP) call between the sender device and the recipient.

7. The method of claim 5, further comprising obtaining the information from a previous interaction in which the sender device received a message with a message header that included the information.

8. The method of claim 1, wherein the selected codec does not perform noise cancellation.

9. The method of claim 8, wherein the audio data includes at least one of music data or voice data.

10. The method of claim 1, further comprising, prior to selecting the codec, analyzing content of the audio data received by the sender device, such that the codec is selected based at least on the type of the audio data.

11. The method of claim 10, wherein analyzing content of the audio data comprises recognizing that the audio data includes music data.

12. The method of claim 1, wherein selecting a codec from among a plurality of available codecs, is performed in response to user input identifying the codec to be selected.

13. The method of claim 1, wherein transmitting the compressed audio data from the sender device to the recipient further comprises recording the audio data and transmitting the audio data asynchronously.

14. The method of claim 1, wherein selecting a codec from among a plurality of available codecs further comprises selecting a particular codec that requires processing time that would not permit the particular codec to be used if the audio data were compressed and transmitted in real time.

15. In a wireless sender device operating in a wireless communication system in which audio data is compressed and transmitted from the sender device to a recipient, a method of selecting a codec for compressing the audio data, the method comprising:

receiving, at the sender device, audio data that is to be transmitted to an identified recipient;

receiving, at the sender device, a tone from the recipient, wherein the tone specifies a codec used by the recipient;

in response to receiving the tone, selecting the specified codec at the sender device from among a plurality of available codecs and using the specified codec to compress the audio data; and

initiating transmission of the compressed audio data from the sender device to the recipient.

16. The method of claim 15, wherein receiving, at the sender device, a tone from the recipient further comprises receiving a tone indicating that the recipient includes an interactive voice response (IVR) system.

17. The method of claim 15, wherein receiving, at the sender device, a tone from the recipient further comprises receiving a tone indicating that the recipient includes a computerized voice recognition system.

18. The method of claim 17, wherein receiving, at the sender device, a tone from the recipient further comprises receiving a tone indicating that the codec specified by the tone is optimized for permitting the computerized voice recognition system to process the audio data.

19. The method of claim 15, further comprising:

receiving the tone during an ongoing communication session between the sender device and the recipient; and

selecting the specified codec includes discontinuing use of a previously used codec and initiating use of the specified coded during the ongoing communication session.

20. The method of claim 19, wherein selecting the specified codec further comprises:

discontinuing use of a previously used codec; and

initiating use of the specified codec during the ongoing communication session.

21. The method of claim 19, wherein:

a first portion of the ongoing communication session includes communication to a human recipient;

a subsequent second portion of the ongoing communication session includes communication to a voice recognition system associated with the recipient; and

the tone is received in response to initiation of the second portion of the ongoing communication session.

22. The method of claim 15, wherein the codec specified by the tone is associated with a bit rate that is higher than a bit rate of another codec that would have been used by the sender device in the absence of receiving the tone.

23. The method of claim 22, wherein initiating transmission of the compressed audio data comprises initiating transmission of the compressed audio data using at least one of:

a data channel of the wireless communication system;

Dual-Tone Multi-Frequency (DTMF) tones;

or

modem tones.

24. The method of claim 22, wherein initiating transmission of the compressed audio data further comprises initiating transmission of the compressed audio data to a specified network location that has been determined using a handshake procedure between the sender device and the recipient.

25. In a system including a wireless network, a method for transmitting data from a sender device to a recipient, the method comprising:

receiving audio data at the sender device, wherein the audio data is to be transmitted to a recipient;

collecting information used to select a codec for compressing the audio data;

selecting a particular codec based on the collected information; and

transmitting the compressed audio data to the recipient.

26. The method of claim 25, wherein collecting information used to select a codec further comprises one or more of:

receiving a tone generated by the recipient that identifies the particular codec;

identifying previous messages from the recipient to identify the particular codec;

determining a type of audio data;

determining whether the audio data is to be transmitted in real time or to be recorded and transmitted asynchronously; and

accessing a contact list to identify the particular codec associated with the recipient.

27. The method of claim 25, wherein transmitting the compressed audio data to the recipient further comprises one or more of:

recording the audio data;

transmitting the audio data asynchronously; and

encoding the audio data with the particular codec in real time and transmitting the audio data in real time.

28. The method of claim 25, further comprising changing to a new codec in response to a tone from the recipient.

29. The method of claim 25, wherein receiving audio data further comprises recording raw audio data.