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1.发明授权
公开(公告)号：US4210825A
公开(公告)日：1980-07-01
申请号：US905169
申请日：1978-05-12
IPC分类号： G11C19/28 , H01L29/768 , H01L29/78
CPC分类号： H01L29/76808 , G11C19/282
摘要： A charge transfer device includes two channels and a common input structure. The input structure is operated in a manner to divide a charge packet of signal-independent size into two complementary packets for movement along the two channels. A single-channel embodiment employs a similar input structure.
摘要翻译： 电荷转移装置包括两个通道和一个共同的输入结构。 输入结构以将信号无关大小的电荷分组划分成两个互补分组的方式操作，以沿着两个信道移动。 单通道实施例采用类似的输入结构。
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2.发明授权
公开(公告)号：US4184049A
公开(公告)日：1980-01-15
申请号：US936889
申请日：1978-08-25
CPC分类号： G10L19/00
摘要： To improve the speech quality at lower bit rates within a digital communication system in which the coefficients of a frequency transform (e.g. discrete cosine transform) are adaptively encoded with adaptive quantization and adaptive bit-assignment, the adaptation is controlled by a short-term spectral estimate signal formed by combining the formant spectrum and the pitch excitation spectrum of the coefficient signals.
摘要翻译： 为了在数字通信系统中以较低比特率改善语音质量，其中频率变换（例如，离散余弦变换）的系数被自适应量化和自适应位分配自适应地编码，则适配由短期光谱 通过组合系数信号的共振峰谱和音调激励谱形成的估计信号。
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公开(公告)号：US4486900A
公开(公告)日：1984-12-04
申请号：US363470
申请日：1982-03-30
CPC分类号： G10L25/90
摘要： Continuous stream processing of an input signal to find the autocorrelation function and pitch period is simplied. The input speech signal is sampled at 8 khz, from which the autocorrelation function is formed by multiplying each sample by a stored-delay reduced sequence of up to 30 past samples. The reduced sequence is formed by every fourth sample of input signal gated to storage. Autocorrelation values are sequentially compared by a peak-peaker for maxima, thus further minimizing storage requirements to find the pitch period.
摘要翻译： 输入信号的连续流处理可以简化自相关函数和音调周期。 输入语音信号以8khz进行采样，通过将每个采样乘以多达30个过去采样的存储延迟减少序列，从中形成自相关函数。 减少的序列由门控到存储的输入信号的每四个样本形成。 自相关值由峰值峰值顺序比较，以获得最大值，从而进一步最小化存储要求以找到音调周期。
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