參數(shù)資料
型號(hào)： TAS5508BPAGR
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝： GREEN, PLASTIC, TQFP-64
文件頁(yè)數(shù)： 32/103頁(yè)
文件大小： 1198K
代理商： TAS5508BPAGR
k2
T2
k1
k0
T1
O1
O2
DRC Input Level
DRC
Compensated
Output
1:1 Transfer Function
Implemented Transfer Function
Region
0
Region
1
Region
2
M0014-01
TAS5508B
8-Channel Digital Audio PWM Processor
SLES162C – DECEMBER 2005 – REVISED JULY 2009
www.ti.com
Figure 2-17 illustrates a typical DRC transfer function.
Figure 2-17. Dynamic Range Compression (DRC) Transfer Function Structure
The three regions shown in Figure 2-17 are defined by three sets of programmable coefficients:
Thresholds T1 and T2 define region boundaries.
Offsets O1 and O2 define the DRC gain coefficient settings at thresholds T1 and T2, respectively.
Slopes k0, k1, and k2 define whether compression or expansion is to be performed within a given
region. The magnitudes of the slopes define the degree of compression or expansion to be performed.
The three sets of parameters are all defined in logarithmic space and adhere to the following rules:
The maximum input sample into the DRC is referenced at 0 dB. All values below this maximum value
then have negative values in logarithmic (dB) space.
The samples input into the DRC are 32-bit words and consist of the upper 32 bits of the 48-bit word
format used by the digital audio processor (DAP). The 48-bit DAP word is derived from the 32-bit serial
data received at the serial-audio receive port by adding 8 bits of headroom above the 32-bit word and
8 bits of computational precision below the 32-bit word. If the audio-processing steps between the SAP
input and the DRC input result in no accumulative boost or cut, the DRC operates on the 8 bits of
headroom and the 24 MSBs of the audio sample. Under these conditions, a 0-dB (maximum value)
audio sample (0x7FFF FFFF) is seen at the DRC input as a –48-dB sample (8 bits
× –6 dB/bit = –48
dB).
Thresholds T1 and T2 define, in dB, the boundaries of the three regions of the DRC, as referenced to
the rms value of the data into the DRC. Zero-valued threshold settings reference the maximum-valued
rms input into the DRC and negative-valued thresholds reference all other rms input levels.
Positive-valued thresholds have no physical meaning and are not allowed. In addition, zero-valued
threshold settings are not allowed.
Although the DRC input is limited to 32-bit words, the DRC itself operates using the 48-bit word format of
the DAP. The 32-bit samples input into the DRC are placed in the upper 32 bits of this 48-bit word space.
This means that the threshold settings must be programmed as 48-bit (25.23 format) numbers.
CAUTION
Zero-valued and positive-valued threshold settings are not allowed and cause
unpredictable behavior if used.
Offsets O1 and O2 define, in dB, the attenuation (cut) or gain (boost) applied by the DRC-derived gain
coefficient at the threshold points T1 and T2, respectively. Positive offsets are defined as cuts, and
thus boost or gain selections are negative numbers. Offsets must be programmed as 48-bit (25.23
format) numbers.
Description
34
相關(guān)PDF資料
PDF描述
TAS5508BPAG SPECIALTY CONSUMER CIRCUIT, PQFP64
TAS5508PAG SPECIALTY CONSUMER CIRCUIT, PQFP64
TAS5508PAGRG4 SPECIALTY CONSUMER CIRCUIT, PQFP64
TAS5508PAGR SPECIALTY CONSUMER CIRCUIT, PQFP64
TAS5508PAGG4 SPECIALTY CONSUMER CIRCUIT, PQFP64
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TAS5508BPAGRG4 功能描述:音頻 DSP 8 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TAS5508C 制造商:TI 制造商全稱:Texas Instruments 功能描述:8-Channel Digital Audio PWM Processor
TAS5508CPAG 功能描述:音頻 DSP 8Ch PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TAS5508CPAGR 功能描述:音頻 DSP 8Ch PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TAS5508CPAGR 制造商:Texas Instruments 功能描述:IC Digital Audio PWM Processor 64-TQFP
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*