DSP

P480A数字音箱处理器-2013款

2019-07-13 20:27发布

站内文章 / DSP
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  产品：4进8出音箱处理器 特点：1、高精度浮点处理，使用高性能浮点处理器。       2、实时48K采样,24bit采样宽度，使用cirrus高性能AD/DA转换芯片。       3、使用通用DSP开发平台和优秀的算法处理程序，算法性能稳定,可靠。       4、区别于市面上使用的单个专用定点芯片方案，优秀的浮点处理能力让声音的损失趋于最小，计算精度达到最高，通过算法优化实现低频（20HZ-200HZ）、高Q值（16-72）的无引入噪声PEQ，GEQ和XOVER处理；       5、31段GEQ的THD+N小于0.005%，低频高Q值的PEQ的THD+N小于0.003%,XOVER 48dB斜率时的THD+N小于0.003%;       6、滤波器频率调节精度1Hz，电平调节精度0.25dB. 功能：1、4路模拟音频输入，8路模拟音频输出。       2、4通道输入,基本算法按照8通道输入设计,只要简单的加入音频AD就可以实现8通道输入采集和处理.每个输入通道包含1个31段图形均衡器，7段参数均衡器，延时器(2500ms)，电平控制，相位控制，其中参数均衡器包括了peak filter，lowpass filter，highpass filter，low shelf filter和high shelf filter 5种,参数均衡器的增益值，频程或者Q值，中心频率值均可调。       3、8通道输出，每输出通道包含7段参数均衡器，延时器，电平控制，相位控制，高通滤波器，低通滤波器，路由器和压限器。参数均衡器包括了peak filter，lowpass filter，highpass filter，low shelf filter和high shelf filter 5种,参数均衡器的增益值，频程或者Q值，中心频率值均可调。高通，低通滤波器有3种类型：巴特沃斯滤波器，贝塞尔和宁－克锐，斜率是6dB,12dB,18dB,24dB,30dB,36dB,42dB和48dB；扩展版本可以加入FIR滤波器。路由器可以任意路由输入输出信号。压限器配置参数包含压限电平，压缩比率，压缩时间和释放时间。 参数测试平台：Audio Precision 最大输入输出信号值：+19.3dBu； 本底噪声：-91dBu 综合信噪比：110dB 频谱曲线：±0.08dB(20Hz-20KHz) THD+N: 0.0025% （1K 0dBu） 平衡度：0.0 % 整机代理商出货价格低于标明的价格； 可OEM或ODM，量大价格面议。     Products:4 inputs 8 outputs speaker processor.   Features: 1. High-precision floating-point processing, using high-performance floating-point processor.       2. Real-time 48K sampling, 24bit sample width, to use the cirrus logic high-performance AD / DA converter.         3. Using a common DSP develop platform and excellent processing procedures, the algorithm performance is stable and reliable.         4. P480A is different from the fixed-pointSolutions,it use the excellent floating-point processing, so that the loss of the voice tends to the smallest and hold the highest accuracy, through algorithm optimization to achieve a low-frequency (20HZ-200HZ), high Q values (16 -- 72) PEQ, GEQ and XOVER processing without any introduction of noise;         5. The THD + N of 31-band GEQ less than 0.005%, the low-frequency high-Q value of the PEQ less than 0.003%,and the XOVER less than 0.003% when at 48dB slope;         6. The filter frequency adjustment accuracy is 1Hz, level accuracy of gain is 0.25dB.   Functions:    4-channel input:    The basic algorithm is designed in accordance with 8-channel input, as long as a simple audio AD can be achieved by adding 8-channel input capture and processing. Each input channel includes: 31-band graphic equalizer; 7-bank Parametric EQ; delay device (total delay 2500ms, 21us steps); level Controller; phase Controller; and parametric EQ which includes: peak filter lowpass filter, highpass filter, low shelf filter, high shelf filter, allpass filtera. The parametric EQ's gain, frequency range, Q value and the center frequency value can be adjusted.          8-channel outputs: each output channel includes:   7-bank parametric EQ, delay, level control, phase control, high-pass filter, low pass filters, routers, and pressure limiter.  Parametric EQ, including 6 types: peak filter, lowpass filter, highpass filter, low shelf filter, high shelf filter and allpass filter. The parametric EQ's gain, frequency range, Q value,and the center frequency values can be adjusted.   Crossoverincludes a High-pass and a low-pass filter which has three kinds of types: Butterworth, Bessel and Linkwitz-Riley filters, the slope is 6dB, 12dB, 18dB, 24dB, 30dB, 36dB, 42dB and 48dB; extended version can join the FIR filter.   Routercan route any input and output signals.   Limiterconfiguration parameters include pressure limit level, compression ratio, compression time and release time.    

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