公开(公告)号：DE60137376D1

公开(公告)日：2009-02-26

申请号：DE60137376

申请日：2001-04-20

Applicant: QUALCOMM INC

Inventor： ANANTHAPADMANABHAN ARASANIPALAI K ,  MANJUNATH SHARATH ,  HUANG PENGJUN ,  CHOY EDDI-LUN TIK ,  DEJACO ANDREW P

IPC: G10L19/04 ,  G10L19/08 ,  G10L11/00 ,  G10L19/02 ,  G10L19/14 ,  G10L25/90 ,  H03M7/36

Abstract: 13. A computer-readable medium comprising instructions that upon execution in a processor cause the processor to perform the methods as recited in any of claims 5 to 8.

公开(公告)号：CA2748558A1

公开(公告)日：2008-02-07

申请号：CA2748558

申请日：2007-07-30

Applicant: QUALCOMM INC

Inventor： WANG HAOHONG ,  LI HSIANG-TSUN ,  MANJUNATH SHARATH

IPC: H04N13/02 ,  G06T7/00 ,  H04N5/335 ,  H04N7/24 ,  H04N13/207 ,  H04N13/271

Abstract: A monoscopic low-power mobile device is capable of creating real-time stereo images and videos from a single captured view. The device uses statistics from an autofocusing process to create a block depth map of a single capture view. Artifacts in the block depth map are reduced and an image depth map is created. Stereo three-dimensional (3D) left and right views are created from the image depth map using a Z-buffer based 3D surface recover process and a disparity map which is a function of the geometry of binocular vision.

公开(公告)号：ES2288950T3

公开(公告)日：2008-02-01

申请号：ES01930579

申请日：2001-04-18

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  HUANG PENJUNG ,  CHOY EDDIE-LUN TIK

IPC: G10L19/00 ,  G10L19/005 ,  G10L13/00 ,  G10L19/04 ,  G10L19/12 ,  G10L25/90 ,  H03M7/36

Abstract: Un procedimiento para compensar un borrado de trama en un codifcador de voz, que comprende: descuantificar un valor de retardo de paso y un primer valor delta para una trama actual procesada después de que se ha declarado una trama borrada, siendo el primer valor delta igual a la diferencia entre el valor de retardo de paso para la trama actual y un valor de retardo de paso para la trama inmediatamente precedente a la trama actual; recibir un segundo valor delta cuantificado para al menos una trama anterior a la trama actual y después del borrado de trama sin recibir un valor de retardo de paso cuantificado para la al menos una trama; descuantificar el segundo valor delta para la al menos una trama antes de la trama actual y después del borrado de la trama, en el que el segundo valor de trama es igual a la diferencia entre un valor de retardo de paso para la al menos una trama y un valor de retardo de paso para una trama inmediatamente precedente a la al menos una trama; substraer el primervalor delta del valor de retardo de paso para la tarma actual para generar un valor de retardo de paso para la al menos una trama anterior a la trama actual; y substraer el segundo valor delta del valor de retardo de paso generado para la al menos una trama anterior a la trama actual para generar un valor de retardo de paso para la trama borrada.

公开(公告)号：CA2657267A1

公开(公告)日：2008-01-17

申请号：CA2657267

申请日：2007-07-12

Applicant: QUALCOMM INC

Inventor： YE YAN ,  MANJUNATH SHARATH ,  BAO YILIANG ,  MALAYATH NARENDRANATH

IPC: H04N7/26

Abstract: The disclosure describes FGS video coding techniques that use cycle-align ed fragments (CAFs). The techniques may perform cycle-based coding of FGS vi deo data block coefficients and syntax elements, and encapsulate cycles in f ragments for transmission. The fragments may be cycle-aligned such that a st art of a payload of each of the fragments substantially coincides with a sta rt of one of the cycles. In this manner, cycles can be readily accessed via individual fragments. Some cycles may be controlled with a vector mode to sc an to a predefined position within a block before moving to another block. I n this manner, the number of cycles can be reduced, reducing the number of f ragments and associated overhead. The CAFs may be entropy coded independentl y of one another so that each fragment may be readily accessed and decoded w ithout waiting for decoding of other fragments. Independent entropy coding m ay permit parallel decoding and simultaneous processing of fragments.

公开(公告)号：AT368278T

公开(公告)日：2007-08-15

申请号：AT01930579

申请日：2001-04-18

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  HUANG PENJUNG ,  CHOY EDDIE-LUN

IPC: G10L19/00 ,  G10L19/005 ,  G10L13/00 ,  G10L19/04 ,  G10L19/12 ,  G10L25/90 ,  H03M7/36

Abstract: A frame erasure compensation method in a variable-rate speech coder includes quantizing, with a first encoder, a pitch lag value for a current frame and a first delta pitch lag value equal to the difference between the pitch lag value for the current frame and the pitch lag value for the previous frame. A second, predictive encoder quantizes only a second delta pitch lag value for the previous frame (equal to the difference between the pitch lag value for the previous frame and the pitch lag value for the frame prior to that frame). If the frame prior to the previous frame is processed as a frame erasure, the pitch lag value for the previous frame is obtained by subtracting the first delta pitch lag value from the pitch lag value for the current frame. The pitch lag value for the erasure frame is then obtained by subtracting the second delta pitch lag value from the pitch lag value for the previous frame. Additionally, a waveform interpolation method may be used to smooth discontinuities caused by changes in the coder pitch memory.

公开(公告)号：DE60023913T2

公开(公告)日：2006-08-10

申请号：DE60023913

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH

IPC: G10L19/02 ,  G10L11/00 ,  G10L19/04 ,  G10L19/08 ,  H03M7/30

Abstract: A method and apparatus for encoding a prototype waveform is disclosed comprising performing (614) a cross-correlation between a phase spectra of the prototype waveform and a phase spectra of a reference prototype waveform; generating (614) representatives for the maximum values of the cross-correlation; and quantizing (612, 616) an amplitude vector of the prototype waveform and the representatives; whereupon the amplitude vector and the representatives are transmitted as the encoded form of the prototype waveform. Also disclosed is a method and apparatus for reconstructing a prototype waveform, comprising generating (716) linear phase shift values from received phase parameters; composing (714) a modified phase vector from reference phases and the linear phase shift values; and generating (708, 704) a reconstructed current prototype from the modified phase vector and received amplitude parameters.

公开(公告)号：DE60027573D1

公开(公告)日：2006-06-01

申请号：DE60027573

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： CHOY LUN ,  MANJUNATH SHARATH

IPC: G10L19/02 ,  G10L19/038 ,  G10L19/00 ,  G10L19/12 ,  H03M7/30 ,  H04Q3/42

公开(公告)号：AT322068T

公开(公告)日：2006-04-15

申请号：AT00950441

申请日：2000-07-19

Applicant: QUALCOMM INC

Inventor： ANANTHAPADMANABHAN ARASANIPALA ,  MANJUNATH SHARATH

IPC: G10L19/06 ,  G10L19/00 ,  G10L19/04 ,  H03M7/30

Abstract: A method and apparatus for interleaving line spectral information quantization methods in a speech coder includes quantizing line spectral information with two vector quantization techniques, the first technique being a non-moving-average prediction-based technique, and the second technique being a moving-average prediction-based technique. A line spectral information vector is vector quantized with the first technique. Equivalent moving average codevectors for the first technique are computed. A memory of a moving average codebook of codevectors is updated with the equivalent moving average codevectors for a predefined number of frames that were previously processed by the speech coder. A target quantization vector for the second technique is calculated based on the updated moving average codebook memory. The target quantization vector is vector quantized with the second technique to generate a quantized target codevector. The memory of the moving average codebook is updated with the quantized target codevector. Quantized line spectral information vectors are derived from the quantized target codevector.

公开(公告)号：DE69928288D1

公开(公告)日：2005-12-15

申请号：DE69928288

申请日：1999-12-21

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH ,  GARDNER WILLIAM

IPC: G10L19/12 ,  G10L19/00 ,  G10L19/02 ,  G10L19/04 ,  G10L19/08 ,  H03M7/30

Abstract: A method and apparatus for coding a quasi-periodic speech signal. The speech signal is represented by a residual signal generated by filtering the speech signal with a Linear Predictive Coding (LPC) analysis filter. The residual signal is encoded by extracting a prototype period from a current frame of the residual signal. A first set of parameters is calculated which describes how to modify a previous prototype period to approximate the current prototype period. One or more codevectors are selected which, when summed, approximate the error between the current prototype period and the modified previous prototype. A multi-stage codebook is used to encode this error signal. A second set of parameters describe these selected codevectors. The decoder synthesizes an output speech signal by reconstructing a current prototype period based on the first and second set of parameters, and the previous reconstructed prototype period. The residual signal is then interpolated over the region between the current and previous reconstructed prototype periods. The decoder synthesizes output speech based on the interpolated residual signal.

公开(公告)号：AT309600T

公开(公告)日：2005-11-15

申请号：AT00948764

申请日：2000-07-18

Applicant: QUALCOMM INC

Inventor： MANJUNATH SHARATH

IPC: G10L19/02 ,  G10L11/00 ,  G10L19/04 ,  G10L19/08 ,  H03M7/30

Abstract: A method and apparatus for encoding a prototype waveform is disclosed comprising performing (614) a cross-correlation between a phase spectra of the prototype waveform and a phase spectra of a reference prototype waveform; generating (614) representatives for the maximum values of the cross-correlation; and quantizing (612, 616) an amplitude vector of the prototype waveform and the representatives; whereupon the amplitude vector and the representatives are transmitted as the encoded form of the prototype waveform. Also disclosed is a method and apparatus for reconstructing a prototype waveform, comprising generating (716) linear phase shift values from received phase parameters; composing (714) a modified phase vector from reference phases and the linear phase shift values; and generating (708, 704) a reconstructed current prototype from the modified phase vector and received amplitude parameters.