|
B11.3.2 TV Tuner - Industry Standards
|
| bet | 181/188 | | Sana | 21.03.2017 | | Hajmi | 0,89 Mb. | | #429 |
Note: This list provides complete titles and web locations for references cited. The listing of a reference here does not imply that complete compliance with that reference is a Windows Logo Program requirement.
B11.3.2.1 ATSC Digital Television Standard, Amendment No. 1
http://www.atsc.org/Standards/stan_rps.html
http://www.dvd.org
B11.3.2.3 OpenCable specification
http://www.opencable.com
B11.3.3 TV Tuner – Quality B11.3.3.1 - See B11.3.4.6 B11.3.3.2 through B11.3.3.4 DELETED B11.3.3.5 Pass WHQL tests - See B1.3, B4.1.4.11.
See “Streaming Media and Broadcast” in the HCT documentation.
Design Guideline References:
"TV and Broadcast Driver Architecture" web page at http://www.microsoft.com/hwdev/tech/stream/broadcast/
B11.3.4.1 VBI capture samples VBI data exactly 4.7 or 5 times
To ensure accurate data reception, data transmitted on all lines of the VBI must be oversampled exactly 4.7 or 5 times the North American Basic Teletext (NABTS) data bit rate (or locale-specific data bit rate). For example, if there are 288 bits of NABTS data on a scan line, approximately 1,354 one-byte samples, plus the necessary margin, must be captured per scan line if 4.7x oversampling is used. This represents the number required for timing tolerances in the NABTS specification and also for timing uncertainties within the capture hardware.
If the hardware cannot provide 4.7 or 5 times oversampled VBI data, the device-specific driver must compensate by resampling, so that 4.7 or 5 times oversampled data are presented to the operating system.
B11.3.4.2.1 DELETED B11.3.4.2.2 DELETED B11.3.4.2.3 DELETED B11.3.4.3 through B11.3.4.5 DELETED B11.3.4.6 - See B11.1.4.4.7
|
| |
