公开(公告)号：US06490553B2

公开(公告)日：2002-12-03

申请号：US09781828

申请日：2001-02-12

Applicant: Jean-Manuel Van Thong ,  Davis Pan

Inventor： Jean-Manuel Van Thong ,  Davis Pan

IPC: G10L2104

CPC classification number: H04N5/278 ,  G10L15/26

Abstract: The disclosed method and apparatus controls the rate of playback of audio data corresponding to a stream of speech. Using speech recognition, the rate of speech of the audio data is determined. The determined rate of speech is compared to a target rate. Based on the comparison, the playback rate is adjusted, i.e. increased or decreased, to match the target rate.

Abstract translation: 所公开的方法和装置控制对应于语音流的音频数据的重放速率。 使用语音识别，确定音频数据的语音速率。 将确定的语速与目标速率进行比较。 基于比较，调整播放速率，即增加或减少，以匹配目标速率。

公开(公告)号：US5692102A

公开(公告)日：1997-11-25

申请号：US548773

申请日：1995-10-26

Applicant: Davis Pan

Inventor： Davis Pan

IPC: G10L19/00 ,  G10L7/00

CPC classification number: G10L19/028

Abstract: The present invention provides a device, method and system of noise injection to maximize compressed audio quality while enabling bitrate scalability. It includes at least one of an encoder and a decoder. The encoder includes a zero detection unit, coupled to receive a frequency domain quantized signal, for determining a control signal that indicates whether noise injection is implemented and a normalization computation unit, coupled to receive at least unquantized signal values and the control signal, for determining a normalization term in accordance with the control signal. The decoder includes a zero detection unit, coupled to receive a frequency domain quantized signal, for determining a control signal that indicates when noise injection is active and a noise generation and normalization unit, coupled to receive a normalization term and the control signal, for generating, normalizing, and injecting a predetermined noise signal where indicated by the control signal.

Abstract translation: 本发明提供一种噪声注入的装置，方法和系统，以最大限度地提高压缩音频质量，同时实现比特率可扩展性。 它包括编码器和解码器中的至少一个。 编码器包括零检测单元，耦合以接收频域量化信号，用于确定指示是否实施噪声注入的控制信号;以及归一化计算单元，被耦合以接收至少未量化的信号值和控制信号，用于确定 根据控制信号的归一化项。 解码器包括零检测单元，耦合以接收频域量化信号，用于确定指示何时噪声注入有效的控制信号，以及耦合以接收归一化项和控制信号的噪声产生和归一化单元，用于产生 ，归一化和注入由控制信号指示的预定噪声信号。