2/24/2008 9T6WP
BCM7405 Preliminary Hardware Data Module
Functional Description 06/29/07
Broadcom Corporation
Page 1-10 Video Data Flow Document 7405-1HDM00-R
VIDEO ENCODER
The VEC supports a variety of analog video standards (NTSC [all variations], PAL [all variations], SECAM, 480i, 480p, 576i,
576p, 720p, 1080i, 1080p24, and 1080p30) as well as HDMI digital video standards. 1080p50 and 1080p60 display formats
are not supported.
Each VEC also receives encoded VBI signals from associated VBI encoders. The VBI data combines with the appropriate
lines of video. This arrangement supports Closed Caption, NABTS, Teletext, CGMS-A, Gemstar, SCTE20/21, AMOL I/II,
analog pass-through, and other VBI formats on the CVBS and Y/C outputs.
The VEC outputs either an HD or SD stream on the first television output, and a scaled down version of an HD image on the
second television output. The BCM7405 provides a single user experience that allows for simultaneous outputs of the same
content for high definition and standard definition televisions.
VIDEO DACS
The BCM7405 integrates a set of six 10-bit video DACs, using Broadcom’s proven high-speed CMOS DAC technology.
These DACs are configured to support SCART1 as well as component, S-Video (Y/C), and composite video (CVBS) outputs.
Table 1-2 outlines the configuration parameters.
Table 1-2: Video DAC Configuration
Usage Mode Video Display 1 Video Display 2
Unless otherwise noted, each box indicates the analog format that is provided for the indicated usage mode. Each display
has its own graphics compositor, which can be independently controlled.
3:3 Configuration Component (including 480P RGB) Composite and S-Video of the same
content as video display 1.
4:2 Configuration Component (including 480P RGB) + Composite Composite or S-Video of the same
content as video display 1.
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