Error Concealment
    21.
    发明申请
    Error Concealment 有权
    错误隐藏

    公开(公告)号:US20130159805A1

    公开(公告)日:2013-06-20

    申请号:US13682073

    申请日:2012-11-20

    IPC分类号: G06F11/08

    摘要: A method and apparatus for selectively replacing damaged portions of a data stream. The method comprises analyzing the data stream to identify damaged portions therein; selecting a damaged portion for replacement; and replacing the selected damaged portion. The selected damaged portion is selected for replacement in dependence on a rate of replacement, the rate of replacement being that at which previous portions of the data stream have been replaced.

    摘要翻译: 一种用于选择性地替换数据流的损坏部分的方法和装置。 该方法包括分析数据流以识别其中的损坏部分; 选择损坏部分进行更换; 并更换所选择的损坏部分。 选择的损坏部分根据替换速率被选择用于替换,替换速率是数据流的先前部分被替换的速率。

    Pitch or periodicity estimation
    22.
    发明授权
    Pitch or periodicity estimation 有权
    间距或周期性估计

    公开(公告)号:US08280725B2

    公开(公告)日:2012-10-02

    申请号:US12474004

    申请日:2009-05-28

    申请人: Xuejing Sun

    发明人: Xuejing Sun

    IPC分类号: G10L11/04

    CPC分类号: G10L25/90

    摘要: A method of estimating a pitch period of a first portion of a signal wherein the first portion overlaps a previous portion. The method comprises computing a first autocorrelation value for part of the first portion not overlapping the previous portion. The method further comprises retrieving a stored second autocorrelation value for part of the first portion overlapping the previous portion, the second autocorrelation value having been computed during estimation of a pitch period of the previous portion. The method further comprises forming a combined autocorrelation value using the first and second autocorrelation values, and selecting the estimated pitch period in dependence on the combined autocorrelation value.

    摘要翻译: 一种估计信号的第一部分的音调周期的方法,其中第一部分与先前部分重叠。 该方法包括计算第一部分的与第一部分不重叠的部分的第一自相关值。 所述方法还包括:针对与前一部分重叠的部分第一部分检索所存储的第二自相关值,在估计前一部分的音调周期期间已经计算出第二自相关值。 该方法还包括使用第一和第二自相关值形成组合自相关值,并根据组合的自相关值选择估计的音调周期。

    Pitch range refinement
    23.
    发明授权
    Pitch range refinement 有权
    音高范围细化

    公开(公告)号:US08214201B2

    公开(公告)日:2012-07-03

    申请号:US12274061

    申请日:2008-11-19

    申请人: Xuejing Sun

    发明人: Xuejing Sun

    IPC分类号: G10L11/04

    摘要: A method of refining a pitch period estimation of a signal, the method comprising: for each of a plurality of portions of the signal, scanning over a predefined range of time offsets to find an estimate of the pitch period of the portion within the predefined range of time offsets; identifying the average pitch period of the estimated pitch periods of the portions; determining a refined range of time offsets in dependence on the average pitch period, the refined range of time offsets being narrower than the predefined range of time offsets; and for a subsequent portion of the signal, scanning over the refined range of time offsets to find an estimate of the pitch period of the subsequent portion.

    摘要翻译: 一种改善信号的音调周期估计的方法,所述方法包括:对于信号的多个部分中的每一个,在预定义的时间偏移范围内扫描以找出预定范围内的部分的音调周期的估计 的时间偏移; 识别部分的估计音调周期的平均音调周期; 根据平均音调周期来确定时间偏移的精细范围,时间偏移的精细范围比预定义的时间偏移范围窄; 并且对于信号的后续部分,在精确的时间偏移范围上扫描以找到随后部分的音调周期的估计。

    Pitch Or Periodicity Estimation
    24.
    发明申请
    Pitch Or Periodicity Estimation 有权
    间距或周期估计

    公开(公告)号:US20100305944A1

    公开(公告)日:2010-12-02

    申请号:US12474004

    申请日:2009-05-28

    申请人: Xuejing Sun

    发明人: Xuejing Sun

    IPC分类号: G10L11/04 G10L21/00

    CPC分类号: G10L25/90

    摘要: A method of estimating a pitch period of a first portion of a signal wherein the first portion overlaps a previous portion. The method comprises computing a first autocorrelation value for part of the first portion not overlapping the previous portion. The method further comprises retrieving a stored second autocorrelation value for part of the first portion overlapping the previous portion, the second autocorrelation value having been computed during estimation of a pitch period of the previous portion. The method further comprises forming a combined autocorrelation value using the first and second autocorrelation values, and selecting the estimated pitch period in dependence on the combined autocorrelation value.

    摘要翻译: 一种估计信号的第一部分的音调周期的方法,其中第一部分与先前部分重叠。 该方法包括计算第一部分的与第一部分不重叠的部分的第一自相关值。 所述方法还包括:针对与前一部分重叠的部分第一部分检索所存储的第二自相关值,在估计前一部分的音调周期期间已经计算出第二自相关值。 该方法还包括使用第一和第二自相关值形成组合自相关值,并根据组合的自相关值选择估计的音调周期。

    ERROR CONCEALMENT
    25.
    发明申请
    ERROR CONCEALMENT 有权
    错误承诺

    公开(公告)号:US20100251051A1

    公开(公告)日:2010-09-30

    申请号:US12414546

    申请日:2009-03-30

    IPC分类号: H04L1/00 H04J3/24

    摘要: A method and apparatus for decoding portions of a data stream, wherein each portion comprises a plurality of samples. The method comprises storing portions of the data stream, decoding portions of the data stream to form decoded portions, and storing the decoded portions. The method further comprises identifying that a portion of the data stream is degraded. Following identifying that a portion of the data stream is degraded, the method generates a decoded portion for the degraded portion of the data stream using the stored decoded portions. The method also updates a state of a decoder by: estimating a pitch period of the degraded portion; selecting a group of successive samples of the stored portions of the data stream, the group of successive samples offset from the degraded portion in the data stream by a multiple of the estimated pitch period; and decoding the selected samples at the decoder.

    摘要翻译: 一种用于解码数据流的部分的方法和装置,其中每个部分包括多个采样。 该方法包括存储数据流的部分,解码数据流的部分以形成解码部分,并存储解码部分。 该方法还包括识别数据流的一部分被降级。 在识别出数据流的一部分劣化之后,该方法使用存储的解码部分生成用于数据流的劣化部分的解码部分。 该方法还通过以下步骤来更新解码器的状态:估计劣化部分的音调周期; 选择所述数据流的存储部分的一组连续样本,所述一组连续样本从所述数据流中的所述劣化部分偏移所述估计的音调周期的倍数; 并在解码器处解码所选样本。