Broadcom BCM7405 - Figure 1-13: VEC Block Diagram; Table 1-9: VBI Encoding; VBI Encoding

2/24/2008 9T6WP
BCM7405 Preliminary Hardware Data Module
Functional Description 06/29/07
Broadcom Corporation
Page 1-52 Video and Graphics Display Document 7405-1HDM00-R
Figure 1-13 illustrates a single-channel implementation of the VEC. By replicating select modules, this architecture can be
expanded to meet any targeted requirement.
Figure 1-13: VEC Block Diagram
The following is a summary of the supported tasks:
• Sync Generation
• DC Level Offset
• Color Space Conversion
• Luminance and Chroma filtering
• Macrovision encoding (Version 7.1.S1)
• VBI Support including Close Caption, Teletext, NABTS, WSS, CGMS-A, Gemstar, SCTE20/21, and AMOL I/II
VBI Encoding
Table 1-9: VBI Encoding
Mnemonic Standard Output format Resolution Direct Encode
Retrieve from
Memory
(Sampled)
Graphics
BVID IEC 61880-1 CVBS/YC 525i Yes Yes Yes
IEC 61880-1 Component 525i Yes Yes Yes
IEC 61880-2 CVBS/YC 525p Yes Yes Yes
IEC 61880-2 Component 525p Yes Yes Yes
CPR-1204-2 CVBS/YC 750p, 1125i TBD – Yes
CPR-1204-2 Component 750p, 1125i TBD – Yes
Closed caption EIA-608 CVBS/YC 525i Yes Yes Yes
EIA-608 Component 525i Yes Yes Yes
WSS ETS 300 294 Component 525i Yes Yes Yes
ETS 300 294 CVBS/YC 525i Yes Yes Yes
Input
Timing
Input
Timing
Video
Formatter
Video
Formatter
Video
Formatter
SRC
Sub-
Carrier
Modulator
Digital Video
Formatter
SRC
Sub-
Carrier
Modulator
SRC
DVI
3 3 3
6
Video 1
Video 2
ITU
R656