English

Arabic Catalan Chinese Czech Danish Dutch English French German Greek Hebrew Hindi Hungarian Italian Japanese Korean Persian Polish Portuguese Romanian Russian Slovak Spanish Swedish Thai Turkish Ukrainian Vietnamese

Chinese

Definition Arabic Catalan Chinese Czech Danish Dutch English French German Greek Hebrew Hindi Hungarian Italian Japanese Korean Persian Polish Portuguese Romanian Russian Slovak Spanish Swedish Thai Turkish Ukrainian Vietnamese

Favorites

Advertising

codebook

View images

Definition

1. lookup table in computing 2. book used to... See more

Translation of "codebook" in Chinese

Definition NEW

码本

脉冲形状码本

編碼簿

码书

编码方式

The paper studies the AMR encoder arithmetic deeply and makes some evolution in sub-band energy judge sub-model of VAD detect model, VQ codebook search model and pitch calculate model.

论文深入研究了AMR编码算法的各个功能模块，并基于相邻语音帧数据的相关性特点，提出了对VAD处理中子带能量判决模块、矢量量化码本搜索模块和基音周期计算模块的改进方案。

At step 1412, each of a plurality of noise pulse templates stored in a codebook is convolved with the impulse response of the LPC prediction error filter used during step 1406 to calculate the LPC prediction residual. This operation generates representations of the noise pulse templates in the same domain as the LPC prediction residual, which is necessary for subsequent matching operations.

在步骤1412中，码本中存储的多个噪声脉冲模板用步骤1406中使用的LPC预测误差滤波器的脉冲响应进行卷积，以计算LPC预测残差。该操作在与LPC预测残差相同的域中生成后续匹配操作所需的噪声脉冲模板的表示。

Vector Quantization (VQ) is one of the popular codebook design methods for text-independent speaker identification.

矢量量化（VQ）方法是文本无关说话人识别中广泛应用的建模方法之一，它的主要问题是码本设计问题。

We found a wireless telegraph and codebook.

搜到一台无线电和密码书

If they use a code, both will require a copy of the same codebook.

如果双方使用一本代码，则需要一份相同的編碼簿。

In order to overcome this problem a multi-section codebook approach has been proposed.

为了从一定程度解决这个问题，二次编码方式诞生了。

There are 18 characters in total, to decode what they're meant to be, we'd need the codebook.

全长一共十八个字要想破译就得找出母本

For smooth areas, the input vectors are encoded with small-size codebook to speed up the encoding and reduce the bit-rate.

对于平滑区域，用较小的码书对输入矢量进行编码，从而加快图像编码速度和降低比特率；

FIG. 5 illustrates example codebook configurations that can be utilized for reporting channel state feedback in accordance with various aspects.

图5示出了依照各个方面用于报告信道状态反馈的示例性码本配置。

As noted above, the techniques applied by L+R pop suppression logic 306 are premised on the recognition that all isolated noise pulses in the L+R signal have very similar shapes and durations, although sometimes multiple pulses can be on top of each other. For example, it was observed in one FM receiver implementation that all isolated noise pulses in the L+R signal had a general shape consisting of a very large peak followed by a number of smaller peaks (with peak amplitudes confined to a fairly narrow amplitude range) and a duration of about. ms. Embodiments described herein leverage this fact by using a pulse shape 揷odebook? to detect the noise pulses. The pulse shape codebook includes a plurality of noise pulse templates obtained by sampling a single representative noise pulse at different phases.

如上所述，虽然有时多个脉冲可能互相重叠，但L+R爆裂抑制逻辑306实施的技术的前提是，L+R信号中的所有独立噪声脉冲都具有非常相似的形状和持续时间。例如，根据观测，在一个FM接收机实施方式中，L+R信号中的所有独立噪声脉冲的基本形状由一个非常大的峰值和后面的多个较小峰值（峰值振幅限于非常窄的振幅范围）组成，其持续时间约为4 ms。本文所述的实施例使用脉冲形状 ¡º码本 ¡±检测噪声脉冲，来验证这一事实。脉冲形状码本包括通过对不同相位下的单个代表性噪声脉冲进行采样而获取的噪声脉冲模板。

Volume IV: develop a codebook

第四卷：编写密码簿

As noted above, L+R pop suppression logic 306 will perform pop suppression on the L+R signal to produce a pop-suppressed L+R signal when the estimated CNR received from CNR estimation logic 302 drops below a predefined threshold, which in one embodiment is 14 dB. Otherwise, L+R pop suppression logic 306 will output an unmodified version of the L+R signal as the pop-suppressed L+R signal. As will be explained in detail in Section B. below, when activated, L+R pop suppression logic 306 utilizes short-term and long-term linear prediction techniques to try to remove an underlying audio signal from the L+R signal. L+R pop suppression logic 306 then attempts to match pulses appearing in the prediction residual to the noise pulse templates in the pulse shape codebook in the prediction residual domain. If a sufficiently good match is obtained, L+R pop suppression logic 306 subtracts the best-matching noise pulse template from the audio signal after optimal scaling. By operating in this manner, an embodiment of L+R pop suppression logic 306 can remove most of the noise pulses appearing in the L+R signal at CNR levels as low as 8 to 9 dB in certain implementations.

如上所述，L+R爆裂抑制逻辑306将在从CNR估算逻辑302接收的估算CNR下降到预定阈值（在一个实施例中为14 dB）以下时对L+R信号进行爆裂抑制，以生成爆裂抑制L+R信号。否则，L+R爆裂抑制逻辑306将输出非修正版的L+R信号，作为爆裂抑制L+R信号。L+R爆裂抑制逻辑306启动时，利用短期和长期线性预测技术尝试将底层音频信号从L+R信号中消除，具体如下文中的B.部分所述。L+R爆裂抑制逻辑306随后尝试将预测残差中出现的脉冲与预测残差域中的脉冲形状码本中的噪声脉冲模板相匹配。如果获得充分匹配，L+R爆裂抑制逻辑306在最佳定标之后从音频信号中减去最匹配的噪声脉冲模板。通过这种方式的操作，L+R爆裂抑制逻辑306的一个实施例可消除特定实施方式中的CNR水平低至8至9 dB的L+R信号中出现的大多数噪声脉冲。

For example, in accordance with one embodiment, a pulse shape codebook was generated, in part, by obtaining eight representative positive noise pulses and eight representative negative noise pulses from a segment of the demodulated L+R signal captured at 11 dB CNR and eight representative positive noise pulses and eight representative negative noise pulses from a segment of the demodulated L+R signal captured at 9 dB CNR. The thirty-two representative noise pulses were then smoothed by upsampling them from 48 kHz to 192 kHz, scaled, and time-aligned. After that, the amplitudes of the samples of the thirty-two scaled and time-aligned representative noise pulses were averaged together, resulting in the average noise pulse shown in FIG. 10.

例如，根据一个实施例，部分地，脉冲形状码本通过从在11 dB CNR下捕获的解调L+R信号的片段中获取八个代表性正噪声脉冲和八个代表性负噪声脉冲，并从在9 dB CNR下捕获的解调L+R信号的片段中获取八个代表性正噪声脉冲和八个代表性负噪声脉冲而生成。三十二个代表性噪声脉冲随后通过从48 kHz至192 kHz的上采样、定标和时间校准而进行平滑。随后，三十二个经过定标和时间校准的代表性噪声脉冲的样本的振幅一起平均，生成图10所示的平均噪声脉冲。