公开(公告)号：DE60028579T2

公开(公告)日：2006-09-28

申请号：DE60028579

申请日：2000-07-19

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  DEJACO P

IPC: G10L19/00 ,  G10L19/04 ,  H04B7/26

Abstract: 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.

公开(公告)号：DE60028579D1

公开(公告)日：2006-07-20

申请号：DE60028579

申请日：2000-07-19

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  DEJACO P

IPC: G10L19/00 ,  G10L19/04 ,  H04B7/26

Abstract: 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.

公开(公告)号：DE60017763T2

公开(公告)日：2006-01-12

申请号：DE60017763

申请日：2000-07-19

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  DEJACO P

IPC: G10L19/16 ,  G10L19/00 ,  G10L19/02 ,  G10L19/04 ,  G10L19/14 ,  H04W24/02

Abstract: A method and apparatus for maintaining a target bit rate in a speech coder includes a speech coder for encoding a frame at a preselected encoding rate, computing a running average bit rate for a predefined number of encoded frames, subtracting the running average bit rate from a predefined target average bit rate, and dividing the difference by the preselected encoding rate. If the quotient value is negative, a predefined number of possible occurrence counts of speech coder performance threshold values that are less than a current performance threshold value is accumulated, the accumulated number being greater than the absolute value of the quotient. The product of a decrement-per-occurrence-count-value and the predefined number of occurrence counts is subtracted from the current performance threshold value to obtain a new performance threshold value. If the quotient value is positive, a predefined number of possible occurrence counts of speech coder performance threshold values that are greater than the current performance threshold value is accumulated, the accumulated number being greater than the quotient. The product of an increment-per-occurrence-count-value and the predefined number of occurrence counts is added to the current performance threshold value to obtain a new performance.

公开(公告)号：DE60213378D1

公开(公告)日：2006-09-07

申请号：DE60213378

申请日：2002-03-15

Applicant: QUALCOMM INC

Inventor： DEJACO P ,  EL-MALEH KHALED

IPC: H04W88/18

Abstract: A call setup procedure is presented to permit vocoder bypass, which will allow the transmission of wideband speech packets between wideband terminals over narrowband transmission constraints. In addition, methods and apparatus are presented that allow the conversion between a wideband tandem-free operation, a narrowband tandem-free operation, and a standard tandem operation.

公开(公告)号：DE60014583T2

公开(公告)日：2006-03-09

申请号：DE60014583

申请日：2000-02-04

Applicant: QUALCOMM INC

Inventor： DEJACO P ,  WALTERS P ,  GARUDADRI HARINATH

IPC: G10L15/28 ,  G10L15/00 ,  G10L15/06 ,  G10L15/22

Abstract: An apparatus for testing user interface integrity of speech-enabled devices includes a processor and a storage medium coupled to the processor. A set of voiced utterances is stored in the storage medium. A software module is executed by the processor to determine a state of the voice recognizer and provide a response to the voice recognizer in accordance with the determined state. The response may be to produce at least one voiced utterance in accordance with the state. The apparatus may be acoustically coupled to the voice recognizer. The apparatus may also, or in the alternative, be electrically coupled by a cable to the voice recognizer. The set of voiced utterances may include multiple sets of voiced utterances, each set having been spoken by a different person. The set of voiced utterances may also, or in the alternative, include multiple sets of voiced utterances, each set of voiced utterances having been spoken under different background noise conditions. The software module may also be executable to monitor the performance of the voice recognizer.

公开(公告)号：DE60017763D1

公开(公告)日：2005-03-03

申请号：DE60017763

申请日：2000-07-19

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  DEJACO P

IPC: G10L19/16 ,  G10L19/00 ,  G10L19/04 ,  G10L19/14 ,  H04W24/02 ,  G10L19/02

Abstract: A method and apparatus for maintaining a target bit rate in a speech coder includes a speech coder for encoding a frame at a preselected encoding rate, computing a running average bit rate for a predefined number of encoded frames, subtracting the running average bit rate from a predefined target average bit rate, and dividing the difference by the preselected encoding rate. If the quotient value is negative, a predefined number of possible occurrence counts of speech coder performance threshold values that are less than a current performance threshold value is accumulated, the accumulated number being greater than the absolute value of the quotient. The product of a decrement-per-occurrence-count-value and the predefined number of occurrence counts is subtracted from the current performance threshold value to obtain a new performance threshold value. If the quotient value is positive, a predefined number of possible occurrence counts of speech coder performance threshold values that are greater than the current performance threshold value is accumulated, the accumulated number being greater than the quotient. The product of an increment-per-occurrence-count-value and the predefined number of occurrence counts is added to the current performance threshold value to obtain a new performance.

公开(公告)号：DE69429270D1

公开(公告)日：2002-01-10

申请号：DE69429270

申请日：1994-09-08

Applicant: QUALCOMM INC

Inventor： GARDNER R ,  JACOBS E ,  PADOVANI ROBERTO ,  ZIV A ,  LAM KATHERINE ,  DEJACO P

IPC: H04B7/26 ,  H04L1/00 ,  H04L12/00 ,  H04L12/56 ,  H04Q11/04 ,  H04W24/00 ,  H04W28/22 ,  H04L1/12 ,  H04Q7/38

Abstract: A method and apparatus are described for controlling the data rates for communications to and from a base station and a plurality of remote users. The usage of the communications resource whether the forward link resource (from base station to remote users) or reverse link resource (from remote users to base station) is measured. The measured usage value is compared against at least one predetermined threshold value and the data rates of communications or a subset of communications on said communications resource is modified in accordance with said comparisons.

公开(公告)号：DE60213378T2

公开(公告)日：2007-09-27

申请号：DE60213378

申请日：2002-03-15

Applicant: QUALCOMM INC

Inventor： DEJACO P ,  EL-MALEH KHALED

IPC: H04W88/18

Abstract: A call setup procedure is presented to permit vocoder bypass, which will allow the transmission of wideband speech packets between wideband terminals over narrowband transmission constraints. In addition, methods and apparatus are presented that allow the conversion between a wideband tandem-free operation, a narrowband tandem-free operation, and a standard tandem operation.

公开(公告)号：DE60030997D1

公开(公告)日：2006-11-09

申请号：DE60030997

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  DEJACO P ,  ANANTHAPADMANABHAN K ,  HUANG PENGJUN ,  CHOY LUN

IPC: G10L19/02 ,  G10L19/00 ,  G10L19/04 ,  G10L19/12 ,  H03M7/36

公开(公告)号：DE69530066T2

公开(公告)日：2004-01-29

申请号：DE69530066

申请日：1995-08-01

Applicant: QUALCOMM INC

Inventor： DEJACO P ,  GARDNER R

IPC: G10L19/24 ,  G10L19/00 ,  G10L19/04 ,  G10L19/14 ,  G10L21/02 ,  G10L25/78 ,  H03M7/30

Abstract: A method of adding hangover frames to a plurality of frames encoded by a vocoder, the method comprising: detecting that a predefined number of successive frames has been encoded at a first rate; determining that a next successive frame should be encoded at a second rate that is less than the first rate; and selecting a number of successive hangover frames beginning with the next successive frame to encode at the first rate, the numbering dependent upon an estimate of a background noise level.