Method and apparatus for non-speech activity reduction of a low bit rate digital voice message
    1.
    发明授权
    Method and apparatus for non-speech activity reduction of a low bit rate digital voice message 失效
    用于低比特率数字语音消息的非语音活动减少的方法和装置

    公开(公告)号:US06370500B1

    公开(公告)日:2002-04-09

    申请号:US09409187

    申请日:1999-09-30

    IPC分类号: G10L1900

    CPC分类号: G10L19/012 G10L25/78

    摘要: A technique is used in a speech encoder (107) that reduces non-speech activity of a low bit rate digital voice message. Speech model parameters that include quantized speech spectral parameter vectors are generated in a sequence of frames. A determination is made as to which frames of the sequence of frames are voiced frames and which frames are unvoiced frames. A consecutive sequence of frames of unvoiced frames is identified (2330) as an unvoiced burst when a length, NUV, of the consecutive sequence of frames exceeds a predetermined length, Ns. A non-speech activity portion of the unvoiced burst is identified (2335-2365) and removed.

    摘要翻译: 在语音编码器(107)中使用技术来减少低比特率数字语音消息的非语音活动。 包括量化语音频谱参数矢量的语音模型参数在帧序列中生成。 确定帧序列的哪些帧是浊音帧,哪些帧是清音帧。 当连续帧序列的长度NUV超过预定长度Ns时,确定无声帧的连续序列(2330)为无声突发。 确定清音突发的非语音活动部分(2335-2365)并移除。

    Method and apparatus for transferring low bit rate digital voice messages using incremental messages
    2.
    发明授权
    Method and apparatus for transferring low bit rate digital voice messages using incremental messages 失效
    用于使用增量消息传送低比特率数字语音消息的方法和装置

    公开(公告)号:US06772126B1

    公开(公告)日:2004-08-03

    申请号:US09410006

    申请日:1999-09-30

    IPC分类号: G10L2104

    CPC分类号: G10L19/24

    摘要: A system controller (106) is for transferring a low bit rate digital voice message. The system controller generates from an analog voice signal representing the voice message a set of speech model parameters, and generates a first derived set of speech model parameters from a first subset of the set of speech model parameters, the first derived set encoding the voice signal at a second voice quality and second vocoder rate that are less, respectively, than a first voice quality and vocoder rate. The system controller transmits (3610) the low bit rate-digital voice message comprising the first derived set of speech model parameters to a communication receiver (114). The communication receiver requests (3640) an incremental message when the quality of the voice message is unsatisfactory. The system controller generates and transmits (3555, 3650) an incremental message-and the communication receiver uses (3660) the incremental message to generate a higher quality voice message.

    摘要翻译: 系统控制器(106)用于传送低比特率数字话音消息。 系统控制器从表示语音消息的模拟语音信号产生一组语音模型参数,并且从语音模型参数集合的第一子集生成第一导出的语音模型参数集,编码语音信号的第一导出集合 分别具有比第一语音质量和声码率更小的第二语音质量和第二声码器速率。 系统控制器将包括第一导出的语音模型参数集合的低比特率数字话音消息(3610)发送到通信接收机(114)。 当语音消息的质量不令人满意时,通信接收器请求(3640)增量消息。 系统控制器生成并发送增量消息(3555,3650),通信接收器使用增量消息(3660)生成更高质量的语音消息。

    Method and apparatus for dynamic segmentation of a low bit rate digital voice message
    3.
    发明授权
    Method and apparatus for dynamic segmentation of a low bit rate digital voice message 失效
    低比特率数字语音消息的动态分割方法和装置

    公开(公告)号:US06418405B1

    公开(公告)日:2002-07-09

    申请号:US09410140

    申请日:1999-09-30

    IPC分类号: G10L1900

    CPC分类号: G10L15/04 G10L19/0018

    摘要: A system controller (106) includes a speech encoder (107) that dynamically segments frames of a low bit rate digital voice message. Speech model parameters have been generated in a sequence of frames. The speech model parameters include quantized speech spectral parameter vectors. The speech encoder selects (1820) a first quantized speech spectral parameter vector as a current anchor vector, selects (1820, 1830) a second quantized speech spectral parameter vector located a predetermined number of frames (LMAX) from the current anchor vector as a target speech parameter vector, and perturbs (1840) the target speech parameter vector to derive a plurality (K) of perturbed speech parameter vectors.

    摘要翻译: 系统控制器(106)包括动态地分段低比特率数字语音消息的帧的语音编码器(107)。 语音模型参数已经在一系列帧中生成。 语音模型参数包括量化语音频谱参数向量。 语音编码器选择(1820)作为当前锚矢量的第一量化语音频谱参数矢量,选择(1820,1830)从位于当前锚矢量的预定数量帧(LMAX)的第二量化语音频谱参数矢量作为目标 语音参数向量,并扰动(1840)目标语音参数向量,以导出多个(K)扰动语音参数向量。

    Method and apparatus for encoding and decoding frames of voice model parameters into a low bit rate digital voice message
    4.
    发明授权
    Method and apparatus for encoding and decoding frames of voice model parameters into a low bit rate digital voice message 失效
    用于将语音模型参数帧编码和解码为低比特率数字话音消息的方法和装置

    公开(公告)号:US06496798B1

    公开(公告)日:2002-12-17

    申请号:US09409183

    申请日:1999-09-30

    IPC分类号: G10L1900

    CPC分类号: G10L19/167

    摘要: A system controller (106) includes a speech encoder (107) that encodes a low bit rate digital voice message. The speech encoder sets values of words of a header of the encoded message. The values of the words define a quantity of frames in the voice message, N, and define a vocoder rate used for the encoded message. The speech encoder sets a state of each indicator in each frame status field of N frame status fields that are transmitted after the header of the encoded message. The speech encoder assembles N frame data fields, wherein each of the frame data fields comprises a set of data words. The N frame data fields follow the N frame status fields. Each set of data words conforms to at least one of the vocoder rate and the states of the indicators. A decoder (3310) decodes the encoded low bit rate digital message.

    摘要翻译: 系统控制器(106)包括编码低比特率数字语音消息的语音编码器(107)。 语音编码器设置编码消息的报头的字的值。 这些字的值定义了语音消息N中的帧数量,并且定义了用于编码消息的声码器速率。 语音编码器在编码消息的头部之后发送的N个帧状态字段的每个帧状态字段中设置每个指示符的状态。 语音编码器组合N个帧数据字段,其中每个帧数据字段包括一组数据字。 N帧数据字段遵循N帧状态字段。 每组数据字符合至少一个声码器速率和指示器的状态。 解码器(3310)对编码的低比特率数字消息进行解码。

    Method and apparatus for pitch determination of a low bit rate digital voice message
    5.
    发明授权
    Method and apparatus for pitch determination of a low bit rate digital voice message 失效
    用于音高确定低比特率数字语音消息的方法和装置

    公开(公告)号:US06418407B1

    公开(公告)日:2002-07-09

    申请号:US09410007

    申请日:1999-09-30

    IPC分类号: G10L1104

    CPC分类号: G10L25/90 G10L19/09 G10L19/10

    摘要: A pitch determiner (931) of a system controller (106) that generates a smoothed pitch value for a current frame of a low bit rate voice message includes a pitch function generator (955) that generates a pitch detection function (PDF) for each frame of digital samples of a voice signal, a pitch candidate selector (960) that selects a future frame pitch candidate from a pitch detection function (PDF), and a pitch adjuster (978) that generates the smoothed pitch value. The pitch adjuster includes a subharmonic pitch corrector (965) that determines a future frame pitch value by performing pitch subharmonic correction of a future frame pitch candidate using a roughness factor of the frequency transformed window.

    摘要翻译: 产生低比特率语音消息的当前帧的平滑的音调值的系统控制器(106)的音调确定器(931)包括:产生用于每个帧的音调检测功能(PDF)的音调函数发生器(955) 语音信号的数字样本,从音调检测功能(PDF)中选择未来的帧间距候选的音调候选选择器(960)以及产生平滑的音调值的音调调节器(978)。 音调调节器包括次谐波音调校正器(965),其通过使用频率变换窗口的粗糙度因子执行对未来帧音调候选的音调次谐波校正来确定未来帧音调值。