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AssigneeQUALCOMM Incorporated
InventorsSharath Manjunath, Andrew P. Dejaco
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A method and apparatus for providing feedback from the decoder to the encoder to improve performance in a predictive speech coder under frame erasure conditions includes notifying an encoder in a receiving speech coder if a decoder in the receiving speech coder fails to receive a frame transmitted by an encoder in a transmitting speech coder. A modified packet is transmitted from the encoder in the receiving speech coder to a decoder in the transmitting speech coder in response to the notification. The decoder in the transmitting speech coder notifies the encoder in the transmitting speech coder when the modified packet is received. The encoder in the transmitting speech coder then encodes a packet with a modified encoding format. The modified encoding format may be either a low-memory encoding format or a memoryless encoding format. The modified packet may have an erasure indicator bit set to a digital value of one.
A speech coding system, comprising:
A method of providing feedback from a first decoder in a first speech coder to a first encoder in a second speech coder, comprising the steps of:
A feedback mechanism in a speech coding system, the speech coding system including first and second speech coders, the first speech coder including a first encoder and a first decoder, the second speech coder including a second encoder and a second decoder, the feedback mechanism comprising:
Dependencies are inferred from the claim text.