1999 Aug 25

14

Philips Semiconductors

Preliminary specification

STB5860 (Set-Top Box) STB concept

OM5730

5.5.4

Table 6

Screens highlighting the main features of the Philips SAA7219/SAA7215 chip-set

SCREEN

FEATURE

Audio

Audio routing and

dual channel

audio routing options: mono, stereo, LL and RR; dual channel options: channels 1 and 2, both

(1-L and 2-R)

Mute

sound muted

Balance

control via a text box for left/right balance

Beep

control of the volume, frequency and duration; the beep can then be heard

LPCM demonstration

Show the possibility of decoding Linear Pulse Code Modulated (LPCM) audio samples. This

besides the decoding of normal MPEG audio although both cannot be not done at the same

time. This feature is for example used to play uploaded audio samples.

A command is given when the audio and video decoding is running. This command will start

the demonstration. The function itself will play about 1 second of LPCM audio and will

continue with normal MPEG audio and video decoding afterwards.

IEEE 1394

IEEE 1394 disable

I/O of IEEE 1394 traffic can be disabled; IEEE 1394 will carry on relaying any IEEE 1394

between the two IEEE 1394 ports; also choose between input/output of data into systems

Smart card

Smart card

a service scrambled using the default keyword will be descrambled upon insertion of a smart

card which contains authorization to use the default keyword

PC download

PC download

When selected, the MPEG board will wait for the download of a BMP picture, via the

IEEE 1284 port. Upon completion of the download the picture will be displayed, the progress

of the download is also displayed.

MIPS performance

MIPS performance

this will show the MIPS performance in drystones under the current setup

Block copy

To show a fast block copy, a bit map picture is copied across the screen. This function is also

supported in HW but handling this in SW makes the function more flexible. The actual copying

is executed in the SAA7215 HW by the DMU. SW however has to upload the picture, initialize

and start the DMU with correct parameters. The cost however compared to the HW tiling is

processor and memory use.

Graphics

Text and drawings

a combination of different fonts and line drawings to demonstrate colour depth and resolution

capabilities

Fast transfer

fast transfer feature; via IEEE 1284

Planes demo

demonstration of the different graphics layers, by displaying quarter screen video over a

MPEG I frame background with superimposed text and cursor

Fade

combination of video and graphic layers showing fading in and out of the graphics layer

Tiling

one smaller picture is displayed multiple times in a user selectable rectangle

Hard-edge wiping

two pictures in one plane, overlapping each other where the user can move and select the

pictures

Soft-edge wiping

two user selectable and movable pictures in two planes, with transparency in the pictures