sorry, newbie can't post links here but here is more info:
"SupraHD 741
ATSC Converter Box
SupraHD® 741 reference design consists of a set-top-box ready for manufacturing and a set-top-box application with complete middleware software stack, including closed-caption support. The set-top-box accepts all the ATSC formats (480i, 480p, 720p, 1080i) and outputs 480i to a NTSC TV.
* Overview
* Features
* Diagrams
Overview
The SupraHD® 741 Processor is highly integrated, consisting of an 8VSB demodulator, an MPEG-2 HD decoder, high-performance CPU, graphics engine, video scaler, channel 3 / 4 modulator, stereo audio DAC and integrated sleep mode support without a microcontroller. It also supports a variety of system interfaces, such as an infrared receiver, flash memory and DDR SDRAM interfaces. The decoded ATSC video stream can be output in composite (CVBS), and S-video (Y/C, optional) and channel 3 / 4 RF modulated formats.
Audio can be output in analog format (L/R). Designed to use the minimum external components, the SupraHD® 741 Processor requires only memory, ATSC tuner, power supply, and a small number of passive components to build a complete ATSC converter box.
SupraHD 741 NTIA Compliance Summary
NTIA Item # NTIA ATSC Converter Box (DTA) Requirements SupraHD® 741 Converter Box Compliance
1 Decoder ✔
2 Output Formats ✔
3 PSIP Processing ✔
4 Tuning Range ✔
5 RF Input ✔
6 RF Output ✔
7 Composite Output ✔
8 RF Dynamic Range ✔
9 Phase Noise ✔
10 ✔
11 First Adjacent Channel Rejection ✔
12 Taboo Channel Rejection ✔
13 Burst Noise ✔
14 Field Ensembles ✔
15 Single Static Echo ✔
16 Channel Display ✔
17 Close Captioning, EAS, Parental Control (V-Chip) ✔
18 Remote Control ✔ (Manufacturer to provide)
19 Audio Outputs ✔
20 Energy Standards ✔
21 Owner's Manual ✔ (Manufacturer to provide)
22 LED Indicator ✔
23 RF Cable ✔ (Manufacturer to provide)
24 Signal Quality Indicator ✔
Package Contents
* ATSC converter box reference design
* Power adapter, remote control, and necessary cables
* Pre-loaded ATSC software on flash memory
* Production proven Zoran ATSC middleware and fonts
* Complete documentation for reference design, software, and IC on a CD-ROM
Key Hardware Features
# SupraHD® 741 Processor
# SPI Flash Memory: 1MByte
# DDR SDRAM: 32MByte (16M x 16b)
# ATSC Tuner
# Video Out: 480i composite (CVBS), S-Video (Y/C, optional)
# Audio Out: L/R analog
# IR Remote, I2C
# Ch 3/4 RF out
# Smart antenna (optional)
System Software Features
# NTIA & Energy Star Compliant
# ATSC converter box application software
# PSIP parsing for channel map
# Digital Closed-Captioning (EIA-608)
# Transport, video decode (single MP@HL), audio decode (AC-3, MPEG Layer 1/2/3), graphics, and display drivers
# Peripheral drivers for tuner and demodulator
# Thread-X royalty-free operating system
SupraHD® 741 Block Diagram
SupraHD® 741 Block Diagram (PNG)
(PNG)
SupraHD® 741 System Architecture
SupraHD® 741 System Architecture (PNG)
SupraHD® 741 User Interface
SupraHD® 741 User Interface (PNG)"
