1999 Aug 25

15

Philips Semiconductors

Preliminary specification

STB5860 (Set-Top Box) STB concept

OM5730

Anti-flickering

The anti-flickering demonstration highlights the functions available in the SAA7215 to reduce

the line flickering in graphics regions. During this demonstration, 2 graphics regions are

displayed. One with anti-flickering and one without. The contents of the bit map in the regions

is one that shows flickering without anti-flicker measures active. Video and audio decoding are

still active and visible during the demonstration.

Grab frame store to

continuously location

map on a graphics plane. The picture data of an I or P picture is copied from a frame store to

SDRAM2 memory. During the copy the format of the data is converted from 4:2:0 format to

4:2:2 and converted into the graphics memory bit map format. Then the picture is displayed

on the screen.

The demonstration runs continuously. It displays the running video while a graphics

I and P pictures of the running video.

16 bits/pixel graphics

location

This demonstration shows a 16 bits/pixel bit map in an OSD region on the screen. This picture

original is removed. The scaling is done by using a software routine that executes a DMU

program. During the demonstration, audio and video is playing.

Menu

during all the demonstrations, graphics regions with menu bars and buttons are visible for

control of the demonstration

Scaling

Cut-out

Display of 16 : 9 video on a 4 : 3 display by cutting out 4 : 3 centres and panning/scanning.

This demonstration shows the pan/scan control via the left/right cursor keys. This function

would usually be under control from data in the transport stream.

Letter-box

display of 16 : 9 video on a 4 : 3 display using letter-boxing

Continuous

horizontal, vertical

steps

allows a window to be selected using the cursor; the video will then be resized to fit the

selected window

Video control

Video control

scan, freeze, play and stop

Teletext

Teletext

switch on and off of the VBI insertion by using a graphics region in VBI lines

Debug

Event logging

user enabled event logging provided via the RS232 debug socket

SCREEN

FEATURE