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    Method and apparatus for maintaining a target bit rate in a speech coder
    31.
    发明专利
    Method and apparatus for maintaining a target bit rate in a speech coder 未知

    公开(公告)号：AU6112000A

    公开(公告)日：2001-02-05

    申请号：AU6112000

    申请日：2000-07-19

    Applicant: QUALCOMM INC

    Inventor： MANJUNATH SHARATH ,  DEJACO ANDREW P

    IPC: G10L19/16 ,  G10L19/00 ,  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.

    33.
    发明专利
    未知

    公开(公告)号：FI980207A

    公开(公告)日：1998-03-31

    申请号：FI980207

    申请日：1998-01-29

    Applicant: QUALCOMM INC

    Inventor： GARDNER WILLIAM R ,  MONTA PETER ,  MANJUNATH SHARATH

    IPC: G10L19/02 ,  G10L19/00 ,  G10L19/04 ,  G10L19/06 ,  H03M7/30 ,  H03M7/36 ,  H04B14/04 ,  G10L

    Abstract: A novel and improved method and apparatus for encoding line predictive coding (LPC) data in a speech compression system using line spectral square root values is disclosed. A novel and computationally efficient procedure for determining the set of quantization sensitivities for the line spectral square root values is disclosed, which results in a computationally efficient error measure for use in vector quantization of the line spectral square root values. A novel method of weighting the quantization error is disclosed, which accumulates the quantization error in each line spectral square root value and weights that error by the sensitivity of that line spectral square root value.\!

    35.
    发明专利
    未知

    公开(公告)号：BRPI0714127A2

    公开(公告)日：2012-12-25

    申请号：BRPI0714127

    申请日：2007-07-12

    Applicant: QUALCOMM INC

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

    IPC: H04N7/26

    Abstract: The disclosure describes FGS video coding techniques that use cycle-aligned fragments (CAFs). The techniques may perform cycle-based coding of FGS video data block coefficients and syntax elements, and encapsulate cycles in fragments for transmission. The fragments may be cycle-aligned such that a start of a payload of each of the fragments substantially coincides with a start 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 scan to a predefined position within a block before moving to another block. In this manner, the number of cycles can be reduced, reducing the number of fragments and associated overhead. The CAFs may be entropy coded independently of one another so that each fragment may be readily accessed and decoded without waiting for decoding of other fragments. Independent entropy coding may permit parallel decoding and simultaneous processing of fragments.

    36.
    发明专利
    未知

    公开(公告)号：AT515147T

    公开(公告)日：2011-07-15

    申请号：AT06817135

    申请日：2006-10-18

    Applicant: QUALCOMM INC

    Inventor： TENG CHIA-YUAN ,  MANJUNATH SHARATH ,  YE YAN

    IPC: H04N7/26 ,  H04N7/30

    Abstract: This disclosure describes selective deblock filtering techniques that are particularly useful with coding standards that do not specify in-loop deblock filtering for standard compliance. In accordance with this disclosure, deblock filtering may be selectively performed with respect to block boundaries of a given video block being coded, a motion compensation process can be performed using a filtered version of the prediction video frame used to code the given video block, or both. This disclosure also provides selection rules that can be applied to determine what type of deblocking techniques to apply in various scenarios. The selection rules may improve the video coding and may also ensure that mismatch between video blocks at an encoder and a decoder is not introduced by the deblock filtering.

    37.
    发明专利
    未知

    公开(公告)号：AT487329T

    公开(公告)日：2010-11-15

    申请号：AT06760483

    申请日：2006-05-25

    Applicant: QUALCOMM INC

    Inventor： LIANG YI ,  MANJUNATH SHARATH

    IPC: H04N7/26 ,  H04N7/30

    Abstract: This disclosure describes deblock filtering techniques in which an in-loop deblock filter of a first codec is used as a post deblock filter of a second codec. A number of techniques are also described to facilitate input parameter adjustments and allow for the effective use of the filter with both codecs. The techniques can simplify the architecture of a device that includes multiple codecs operating according to different coding standards. Specifically, the different codecs can use the same deblocking filter regardless of whether the coding standard calls for in-loop filtering or whether post filtering is used. For example, a filter designed as an in-loop deblocking filter for a codec that complies with the ITU-T H.264 coding standard can be used as a post deblocking filter for MPEG-4 video.

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