CXD2720Q-2 datasheet(32/47 Pages) SONY

Part #	CXD2720Q-2

Description	Single-Chip Dolby Pro Logic Surround Decoder

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CXD2720Q-2

11. Microphone Echo Delay Amount Setting

[Relevant coefficients] Tdo (address = 44H), Tre (address = 47H)

Microphone echo delay amount can be varied by setting coefficient Tdo (12 bits from D14 to D3) values. The

relationships between the coefficient and the delay amount differ depending on fs used as shown in Table 11-1.

Coefficient Tre (12 bits from D14 to D3) is microphone input echo initial delay time.

Set in the range of 0008H to Tdo.

Table 11-1. Microphone Echo Delay Amount Setting

Setting value Tdo

0008H

0010H

0018H

·

7ff0H

7ff8H

0000H

4096 step

fs = 44.1kHz

0.045ms

·

185.760ms

0.045ms/step

setting possible

fs = 48kHz

0.042ms

·

170.667ms

0.042ms/step

setting possible

fs = 32kHz

0.063ms

·

256.000ms

0.063ms/step

setting possible

Delay

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CXD2720Q-2 Datasheet(PDF) 32 Page - Sony Corporation

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