Method and apparatuses for improving quality of digitally encoded speech in the presence of interference
AssigneeIntel Corporation
InventorAlan E. Waltho
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AssigneeIntel Corporation
InventorAlan E. Waltho
Estimating the term…
Methods and apparatuses for encoding speech signals in the presence of interference that accurately establishes a speech signal value subsequent to lost transmission packets. For one embodiment of the present invention, the initial bits of a speech transmission packet are encoded using a PCM encoding scheme and the remaining bits are encoded using a CVSD encoding scheme. Upon encoding, the initial bits of each packet, the instantaneous value of the voltage as derived from CVSD coder/decoder at the transmitter is encoded using PCM coding rather than CVSD coding. At the receiver, each packet is decoded independently using the PCM-encoded bits, rather than the terminal value of a preceding packet, to define a starting value. The PCM encoded bits of a valid packet are used to reestablish the signal value, thus avoiding packet-to-packet error extension in the presence of burst interference.
A method comprising:
A method comprising:
A machine-readable medium that provides executable instructions, which when executed by a processor, cause the processor to perform a method comprising:
A machine-readable medium that provides executable instructions, which when executed by a processor, cause the processor to perform a method comprising:
A method comprising:
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Dependencies are inferred from the claim text.