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210 records (took 0.036 seconds)

    32.
    发明专利
    未知

    公开(公告)号：BRPI0719886A2

    公开(公告)日：2014-05-06

    申请号：BRPI0719886

    申请日：2007-10-08

    Applicant: QUALCOMM INC

    Inventor： KRISHNAN VENKATESH ,  RAJENDRAN VIVEK ,  KANDHADAI ANANTHAPADMANABHAN A

    IPC: G10L19/20

    Abstract: Techniques for efficiently encoding an input signal are described. In one design, a generalized encoder encodes the input signal (e.g., an audio signal) based on at least one detector and multiple encoders. The at least one detector may include a signal activity detector, a noise-like signal detector, a sparseness detector, some other detector, or a combination thereof. The multiple encoders may include a silence encoder, a noise-like signal encoder, a time-domain encoder, a transform-domain encoder, some other encoder, or a combination thereof. The characteristics of the input signal may be determined based on the at least one detector. An encoder may be selected from among the multiple encoders based on the characteristics of the input signal. The input signal may be encoded based on the selected encoder. The input signal may include a sequence of frames, and detection and encoding may be performed for each frame.

    SYSTEMS, METHODS, AND APPARATUS FOR WIDEBAND ENCODING AND DECODING OF INACTIVE FRAMES
    36.
    发明申请
    SYSTEMS, METHODS, AND APPARATUS FOR WIDEBAND ENCODING AND DECODING OF INACTIVE FRAMES 审中-公开
    用于无源帧的宽带编码和解码的系统，方法和设备

    公开(公告)号：WO2008016935A3

    公开(公告)日：2008-06-12

    申请号：PCT/US2007074886

    申请日：2007-07-31

    Applicant: QUALCOMM INC ,  RAJENDRAN VIVEK ,  KANDHADAI ANANTHAPADMANABHAN A

    Inventor： RAJENDRAN VIVEK ,  KANDHADAI ANANTHAPADMANABHAN A

    IPC: G10L19/14

    CPC classification number: G10L19/24 ,  G10L21/038

    Abstract: Speech encoders and methods of speech encoding are disclosed that encode inactive frames at different rates. Apparatus and methods for processing an encoded speech signal are disclosed that calculate a decoded frame based on a description of a spectral envelope over a first frequency band and the description of a spectral envelope over a second frequency band, in which the description for the first frequency band is based on information from a corresponding encoded frame and the description for the second frequency band is based on information from at least one preceding encoded frame. Calculation of the decoded frame may also be based on a description of temporal information for the second frequency band that is based on information from at least one preceding encoded frame.

    Abstract translation: 公开了语音编码器和语音编码方法，其以不同速率对非活动帧进行编码。 公开了用于处理编码语音信号的设备和方法，其基于第一频带上的频谱包络的​​描述和第二频带上频谱包络的​​描述来计算解码帧，其中第一频率的描述 频带基于来自相应编码帧的信息，并且第二频带的描述基于来自至少一个先前编码帧的信息。 解码帧的计算还可以基于对基于来自至少一个先前编码帧的信息的第二频带的时间信息的描述。

    SYSTEMS AND METHODS FOR INCLUDING AN IDENTIFIER WITH A PACKET ASSOCIATED WITH A SPEECH SIGNAL
    39.
    发明申请
    SYSTEMS AND METHODS FOR INCLUDING AN IDENTIFIER WITH A PACKET ASSOCIATED WITH A SPEECH SIGNAL 审中-公开
    用于包括具有与语音信号相关联的分组的标识符的系统和方法

    公开(公告)号：WO2008016947A3

    公开(公告)日：2008-03-20

    申请号：PCT/US2007074900

    申请日：2007-07-31

    Applicant: QUALCOMM INC ,  RAJENDRAN VIVEK ,  KANDHADAI ANANTHAPADMANABHAN A

    Inventor： RAJENDRAN VIVEK ,  KANDHADAI ANANTHAPADMANABHAN A

    IPC: G10L19/00

    CPC classification number: G10L19/167 ,  G10L19/24

    Abstract: A method for including an identifier with a packet associated with a speech signal is described. A signal is received. The signal is partitioned into a plurality of frames. A frame of the signal is encoded into a packet. A determination is made if the packet is encoded as a wideband packet or a narrowband packet. An identifier is packed in the packet based on the determination. The packet is transmitted. At least two illegal values are provided from an N-bit parameter, wherein at least one bit from the N-bit parameter is used to carry information. A number of bits from the N-bit parameter that are used to carry information is equal to log 2 (X), wherein X is the number of illegal values provided from the N-bit parameter.

    Abstract translation: 描述了用与语音信号相关联的分组包括标识符的方法。 收到一个信号。 该信号被分割成多个帧。 信号的一帧被编码成一个分组。 确定分组是编码为宽带分组还是窄带分组。 基于该确定将标识符打包在分组中。 数据包被传输。 从N比特参数提供至少两个非法值，其中来自N比特参数的至少一个比特用于承载信息。 N位参数中用于传送信息的位数等于log 2 （X），其中X是N位参数提供的非法值的数量。

    HIGH BAND EXCITATION SIGNAL GENERATION
    40.
    发明专利
    HIGH BAND EXCITATION SIGNAL GENERATION 未知

    公开(公告)号：CA2944874C

    公开(公告)日：2022-09-20

    申请号：CA2944874

    申请日：2015-03-31

    Applicant: QUALCOMM INC

    Inventor： RAMADAS PRAVIN KUMAR ,  SINDER DANIEL J ,  VILLETTE STEPHANE PIERRE ,  RAJENDRAN VIVEK

    IPC: G10L19/12 ,  G10L19/24

    Abstract: A particular method includes determining, at a device, a voicing classification of an input signal. The input signal corresponds to an audio signal. The method also includes controlling an amount of an envelope of a representation of the input signal based on the voicing classification. The method further includes modulating a white noise signal based on the controlled amount of the envelope. The method also includes generating a high band excitation signal based on the modulated white noise signal.

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