公开(公告)号：US20130138437A1

公开(公告)日：2013-05-30

申请号：US13558236

申请日：2012-07-25

Applicant: Hoon-Young Cho ,  Youngik Kim ,  Sanghun Kim

Inventor： Hoon-Young Cho ,  Youngik Kim ,  Sanghun Kim

IPC: G10L15/20

CPC classification number: G10L15/20

Abstract: A speech recognition apparatus, includes a reliability estimating unit configured to estimate reliability of a time-frequency segment from an input voice signal; and a reliability reflecting unit configured to reflect the reliability of the time-frequency segment to a normalized cepstrum feature vector extracted from the input speech signal and a cepstrum average vector included for each state of an HMM in decoding. Further, the speech recognition apparatus includes a cepstrum transforming unit configured to transform the cepstrum feature vector and the average vector through a discrete cosine transformation matrix and calculate a transformed cepstrum vector. Furthermore, the speech recognition apparatus includes an output probability calculating unit configured to calculate an output probability value of time-frequency segments of the input speech signal by applying the transformed cepstrum vector to the cepstrum feature vector and the average vector.

Abstract translation: 一种语音识别装置，包括：可靠性估计单元，被配置为从输入语音信号估计时间频率段的可靠性; 以及可靠性反射单元，其被配置为将所述时间频率段的可靠性反映到从所述输入语音信号提取的归一化反相特征向量和在解码中针对HMM的每个状态包括的倒谱平均向量。 此外，语音识别装置包括配置成通过离散余弦变换矩阵变换倒频谱特征矢量和平均矢量的倒频变换单元，并计算变换倒谱矢量。 此外，语音识别装置包括：输出概率计算单元，被配置为通过将变换倒谱矢量应用于倒谱特征向量和平均矢量来计算输入语音信号的时间段的输出概率值。

公开(公告)号：US08219396B2

公开(公告)日：2012-07-10

申请号：US12336208

申请日：2008-12-16

Applicant: Hoon-Young Cho ,  Yunkeun Lee ,  Ho-Young Jung ,  Byung Ok Kang ,  Jeom Ja Kang ,  Kap Kee Kim ,  Sung Joo Lee ,  Hoon Chung ,  Jeon Gue Park ,  Hyung-Bae Jeon

Inventor： Hoon-Young Cho ,  Yunkeun Lee ,  Ho-Young Jung ,  Byung Ok Kang ,  Jeom Ja Kang ,  Kap Kee Kim ,  Sung Joo Lee ,  Hoon Chung ,  Jeon Gue Park ,  Hyung-Bae Jeon

IPC: G10L15/00

CPC classification number: G10L15/01

Abstract: An apparatus for evaluating the performance of speech recognition includes a speech database for storing N-number of test speech signals for evaluation. A speech recognizer is located in an actual environment and executes the speech recognition of the test speech signals reproduced using a loud speaker from the speech database in the actual environment to produce speech recognition results. A performance evaluation module evaluates the performance of the speech recognition by comparing correct recognition results answers with the speech recognition results.

Abstract translation: 用于评估语音识别性能的装置包括用于存储用于评估的N个测试语音信号的语音数据库。 语音识别器位于实际环境中，并且在实际环境中执行使用来自语音数据库的扬声器再现的测试语音信号的语音识别，以产生语音识别结果。 性能评估模块通过将正确的识别结果答案与语音识别结果进行比较来评估语音识别的性能。