Alan Hagge wrote:
Also, I hadn't heard of any plans to do digital audio capture on the NTSC side. I'm not sure it's possible, since there's no hardware MPEG-2 encoder on the NTSC side (actually, there isn't one period, it's just that ATSC is already MPEG-2 encoded by the broadcaster).
I meant analog audio capture for NTSC:
*Analog Audio Capture
*The CX2388x captures and decodes all major terrestrial broadcast audio standards.
The CX2388x digitizes and oversamples the low Intermediate Frequency (IF) signal
from a Television (TV) tuner, and extracts and decodes the broadcast audio signal.
The decoded audio is sample rate converted to a 48 kHz Pulse Code Modulation
(PCM) stereo signal to simplify processing and interfacing. This 48 kHz stream can
be routed to the built-in +85 dB Signal-to-Noise Ratio (SNR) stereo audio Digital-to-
Analog Converters (DACs) for connection to the PC’s sound card or headphones, to an
external digital-audio interface, or to the PCI bus and host for direct capture by a
software audio codec.
If capture of line-level stereo audio signals is required, an inexpensive audio Analog-to-
Digital Converter (ADC) can be directly connected to the CX2388x’s I2S input port
and controlled via the serial bus master.
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