STI5107 데이터 시트보기 (PDF) - STMicroelectronics

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STI5107

Low-cost interactive set-top box decoder

STMicroelectronics 

STi5107

Architecture features

2.7

2.7.1

Graphics and display

Display

The STi5107 uses blitter based display architecture that allows the user to build a complex

user interface with background color, still picture, video plane and on-screen display (OSD)

as illustrated in Figure 7.

Figure 7. Example of composition

Background

color

Decompressed

video

Replay Score Stats

On-screen

display

Replay Score Stats

2.7.2

OSD plane

The OSD plane is managed as a set of horizontal bands with a specification comprising

configuration, bitmap and, for CLUT formats, palette information for each region. The OSD

operates in one of two modes, palette mode or true color mode.

● Palette mode: Each region can be independently specified with a resolution of 8 bpp.

Regions are frame based. Each region palette can support up to 256 colors with up to

24 bits resolution per color entry.

● True color mode: Each region can be independently specified with a 16 bpp resolution

in one of the following direct color formats: RGB565, ARGB1555, or ARGB444.

A vertical inter-field, anti flicker filter is provided to reduce flicker on interlace displays. It is

available for both palette and true color modes.

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