首页>
外国专利>
PITCH PERIOD EQUALIZING APPARATUS, PITCH PERIOD EQUALIZING METHOD, SPEECH ENCODING APPARATUS, SPEECH DECODING APPARATUS, SPEECH ENCODING METHOD AND COMPUTERPROGRAM PRODUCTS
PITCH PERIOD EQUALIZING APPARATUS, PITCH PERIOD EQUALIZING METHOD, SPEECH ENCODING APPARATUS, SPEECH DECODING APPARATUS, SPEECH ENCODING METHOD AND COMPUTERPROGRAM PRODUCTS
展开▼
机译:音高周期均衡设备,音高周期均衡方法,语音编码设备,语音解码设备,语音编码方法和计算机程序产品
展开▼
页面导航
摘要
著录项
相似文献
摘要
A sound encoding technique capable of achieving a low bit rate and reducing the distortion of reproduced sounds as compared with the prior art. There are included a pitch detecting means (5) for detecting the pitch frequency of an input sound signal; a residual calculating means (6) for calculating the difference (residual frequency) between the pitch frequency and a reference frequency; a frequency shifter (4) for shifting the frequency of the input sound signal in proportion to the residual frequency in such a direction that the frequency of the input sound signal becomes closer to the reference frequency, thereby equalizing the pitch periods; an orthogonal transform means for performing, by use of a given number of pitch intervals, an orthogonal transform of the sound signal (pitch-equalized sound signal) outputted from the frequency shifter (4), thereby producing transform factor data ; and a waveform encoding means for encoding the transform factor data.
展开▼