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US 8,150,686 B2Granted
System and method for sending a message type identifier through an in-band modem
AssigneeQUALCOMM Incorporated
InventorsChristian Pietsch, Marc W Werner, Christoph A Joetten, Christian Sgraja
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Abstract
A system and method is provided for sending a message type identifier through a speech codec (in-band) such as found in a wireless communication network. A first predetermined sequence with noise-like characteristics identifies a first message type. A second predetermined sequence with noise-like characteristics identifies a second message type.
Claims34
A method of sending a message type identifier through a speech codec comprising:
- generating a first predetermined sequence comprising a function of a pseudorandom noise sequence, where the first predetermined sequence has noise-like characteristics and wherein the first predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors;
- generating a second predetermined sequence different from the first predetermined sequence;
- sending the first predetermined sequence through the speech codec, wherein the first predetermined sequence is used to identify a first message type;
- and
- sending the second predetermined sequence through the speech codec, wherein the second predetermined sequence is used to identify a second message type.
2 more elements
A non-transitory memory storing a computer program that, when executed, causes a computer to perform the acts of:
- generating a first predetermined sequence comprising a function of a pseudorandom noise sequence, where the first predetermined sequence has noise-like characteristics and wherein the first predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors;
- generating a second predetermined sequence different from the first predetermined sequence;
- sending the first predetermined sequence through the speech codec, wherein the first predetermined sequence is used to identify a first message type;
- and
- sending the second predetermined sequence through the speech codec, wherein the second predetermined sequence is used to identify a second message type.
2 more elements
An apparatus comprising:
- a first generator configured to generate a first predetermined sequence comprising a function of a pseudorandom noise sequence, where the first predetermined sequence has noise-like characteristics and wherein the first predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors;
- a second generator configured to generate a second predetermined sequence different from the first predetermined sequence;
- a speech codec configured to process the predetermined sequences to produce a speech packet,
- wherein the first predetermined sequence is used to identify a first message type;
- and
- wherein the second predetermined sequence is used to identify a second message type.
3 more elements
An apparatus comprising:
- means for generating a first predetermined sequence comprising a function of a pseudorandom noise sequence, where the first predetermined sequence has noise-like characteristics and wherein the first predetermined sequence comprises bit patterns for use in generating correlation peaks that provide the predetermined sequence with a robustness to speech frame errors;
- means for generating a second predetermined sequence different from the first predetermined sequence;
- means for sending the first predetermined sequence through the speech codec, wherein the first predetermined sequence is used to identify a first message type;
- and
- means for sending the second predetermined sequence through the speech codec, wherein the second predetermined sequence is used to identify a second message type.
2 more elements
Dependencies are inferred from the claim text.