Toshiba RF Receiver for HDTV Presentation 2: 10/21/2004 Team: Josue Caballero, Brett DiCio, Daniel Hooper, Efosa Ojomo, George Sewell

This past week ► Primary goal was establishing meeting time with customer ► Second goal was to research known topics relative to our project  Cable TV signal  Cable TV tuners  HDTV signal  Standard HDTV device interface

Preliminary Information On TV Tuners ► Cable, Satellite, OTA  8-VSB  QPSK  QAM ► HDTV-ready, capable, integrated  OTA-$300  Cable/Satellite -$1000

8-VSB ► Energy Dispersal ► Coding: R-S, Trellis ► Interleaving ► Modulation ► Recieving...

NTSC Tuner

Key Points ► Satellite and Cable are unregulated  Purchasing HD-ready vs. Integrated ► Theory on integrated tuners  Toshiba and Comcast  Contact Comcast ► Solution is much more complex than OTA solution.

Introduction to HDTV ► Original Impetus – Wide screen movies ► Early 1980’s movie producers were offered HDTV technology ► After introduction to film industry, HDTV for commercial broadcasting was considered ► Most significant problem – Compatibility with color TV

What is HDTV? ► High Definition Television ► Broadcast of TV signals with higher resolution than traditional formats allow. (NTSC, PAL, SECAM ) ► HDTV has an aspect ratio (displayed width of an image divided by the height of that image) of 16:9. The aspect ratio of traditional TV is 4:3. ► HDTV’s high resolution images (1980 pixels x 1080 lines or 1280 pixels by 720 lines) are much sharper and allow much more detail compared to analog TV or even DVDs. ► MPEG-2 (used to encode audio and video for broadcast signals including digital satellite and cable TV) is used as the compression codec. ► The HDTV transmission is based on a 19.3Mbps digital data stream

Different HDTV Formats ► 1080p – 1920 x 1080 pixels progressive ► 720p – 1280 x 720 pixels progressive ► 1080i – 1920 x 1080 pixels interlaced Interlaced and Progressive are both scanning methods. Interlaced: There is an alternation between odd and even scans. There are thirty frames shown per second. Progressive: This method shows the whole picture. It has every line in one showing and produces better picture. However, it uses more bandwidth.

DTV Format Comparison Chart

The difference is clear with HDTV ► Standard TV has roughly 200,000 pixels ► HDTV has about 10 times that ( pixels) ► HDTV also allows for extra image area

Issues with HDTV ► Bandwidth Limitations – 6MHz, 18MHz ► Distribution – Terrestrial, Satellite, or Cable ► Interlaced vs. Non-Interlaced (Progressive) ► Compression

Objectives for Next Week ► Factory tour and meeting with project customer: Friday, October 29 ► Requirements document ► Continue HDTV and Cable TV research ► Begin Satellite & C-Band research  

References ► 8-VSB picture – "A Guide to MPEG Fundamentals and Protcal Analysis: Including DVB and ATSC " by ► Tuner Picture – "VCR and TV html html html ► ► Tweeter ► Brian Lenon – Vanderbilt Graduate Student