STA381BWS datasheet(133/174 Pages) STMICROELECTRONICS

номер детали	STA381BWS

подробное описание детали	Sound Terminal 2.1-channel high-efficiency digital audio system

PDF	174 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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133 / 174 page

DocID018937 Rev 7

133/174

STA381BWS

automatically selects the anticlipping mode. The release of the limiter, when the gain is

again increased, is dependent on an RMS-detect algorithm. The output of the volume/limiter

block is passed through an RMS filter. The output of this filter is compared to the release

threshold, determined by the release threshold register. When the RMS filter output falls

below the release threshold, the gain is again increased at a rate dependent upon the

release rate register. The gain can never be increased past its set value and, therefore, the

release only occurs if the limiter has already reduced the gain. The release threshold value

can be used to set what is effectively a minimum dynamic range, this is helpful as

overlimiting can reduce the dynamic range to virtually zero and cause program material to

sound “lifeless”.

In AC mode, the attack and release thresholds are set relative to full-scale. In DRC mode,

the attack threshold is set relative to the maximum volume setting of the channels mapped

to that limiter, and the release threshold is set relative to the maximum volume setting plus

the attack threshold.

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STA381BWS датащи(PDF) 133 Page - STMicroelectronics