GS2960A Datasheet, PDF (25/99 Pages) Gennum Corporation – Ancillary data extraction

4. Detailed Description
4.1 Functional Overview
The GS2960A is a multi-rate, multi-standard receiver with integrated SMPTE video
processing, compliant with SMPTE 425M, SMPTE 424M, SMPTE 292 and SMPTE 259M-C
signals. When used in conjunction with Gennum's 3Gb/s-capable equalizers, a complete
receive solution that supports full bandwidth 1080p video at 2.97Gb/s can be realized.
The GS2960A includes an integrated reclocker, serial data loop through output, robust
serial-to-parallel conversion, integrated SMPTE video processing, and additional
processing functions such as ancillary data extraction, EDH support, and DVB-ASI
decoding.
The device supports four distinct modes of operation that can be set through external
device pins or by programming internal registers through the host interface; SMPTE
mode, Data-Through mode, DVB-ASI mode and Standby mode.
In SMPTE mode, all video processing features are enabled by default.
In DVB-ASI mode, the GS2960A carries out 8b/10b decoding and generates 10-bit
parallel DVB-ASI compliant data.
In Data-Through mode, the device operates as a simple serial to parallel converter. No
additional processing features are enabled.
Standby mode is the low power consumption mode of the device. In this mode, the
internal reclocker unlocks, and the internal configuration registers are not accessible
through the host interface.
The GS2960A includes a JTAG interface for boundary scan testing.
4.2 SMPTE 425M Mapping - 3G Level A and Level B Formats
4.2.1 Level A Mapping
Direct image format mapping - the mapping structure used to define 1080p/50/59.94/60
4:2:2 YCbCr 10 bit data, as supported by the GS2960A. See Figure 4-1:
Data Stream 1
EAV
Data Stream 2
HANC
SAV
Figure 4-1: Level A Mapping
Active Video
GS2960A 3Gb/s, HD, SD SDI Receiver
Data Sheet
54384 - 2
September 2012
25 of 99