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STV8217 bảng dữ liệu(PDF) 40 Page - STMicroelectronics

tên linh kiện STV8217
Giải thích chi tiết về linh kiện  Digital Audio Decoder/Processor for A2 and NICAM Television/Video Recorders
PDF  156 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV8217 bảng dữ liệu(HTML) 40 Page - STMicroelectronics

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Dedicated Digital Signal Processor (DSP)
STV82x7
40/156
The beeper tone level and frequency are programmed in register BEEPER_FREQ_VOL. The level
(or volume) ranges between 0 dB and -93 dB in steps of 3 dB and the tone frequency ranges
between 62.5 Hz and 8 kHz in steps of 1 octave.
A beep generator is shared only by the Loudspeakers or Headphone outputs. Therefore, in the
event of simultaneous beeps when in Pulse mode, only the first beep will define the effective
duration that will be the same for both outputs.
4.16
Internal Audio/Video Delay (Lip Sync)
Since increasing processing on the video signal implies more delay compared to the audio signal,
there is a possibility inside the device of compensating by inserting a delay on the audio path in
order to resynchronize the two signals:
● 60ms with 48 KHz sampling frequency (SCART only input mode)
● 90ms with 32 KHz sampling frequency (demodulator input mode)
The same delay is available for the LS path and/or the HP path.
Figure 22: Pulse Mode
Figure 23: Continuous Mode
62.5 Hz < f < 8 kHz
BEEP_ON = 1
BEEP_ON = 0
T predefined
0.1, 0.25, 0.5 and 1.0 s
62.5 Hz < F < 8 kHz
BEEP_ON = 1
BEEP_ON = 0
T defined by I²C write



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