Re: A REVOLUTION!!!! REAL TIME CODEC MPEG-2!!!!! (fwd)

Jay_Feldis@logitech.com
27 Apr 95 10:07


[Text item: Re: A REVOLUTION!!!! REAL TIME CODEC MPEG-2!!!!! (fwd)]
OriginalPath:
How much is "affordable"? What do these codec chips cost?

Although they operate on the video in real-time, what is the delay in the
transmission?

My undersatnding is that MPEG is targeted at storing and retrieving video
in a highly compressed format (ie- for video on demand), minimizing
transmission delays is not the focus.

/Jay

---------- Forwarded message ----------
Date: Thu, 27 Apr 1995 01:37:33 -0700 (PDT)
From: Netman <eabu927@rigel.oac.uci.edu>
To: Roger Lee Boston <rboston@tenet.edu>
Subject: Re: A REVOLUTION!!!! REAL TIME CODEC MPEG-2!!!!!

I can't agree with you more, videoteleconferencing is going to go
ballistic very soon....Cuseeme can make some good money if they can get a
commercial product out fast which incorporates MPEG-2 compression... it
is based on an MPEG-2 Video Encoder Chip and a Decoder Chip...this is the
big deal....whereas MPEG-2 isn't very NEW news, the affordability and
speed of MPEG-2 on the new IBM codec is Astounding....you don't have to
wait 8 hours to encode a second of video!!! and ya don't need Gigabytes
of space for a min of video.....the processor is a 50 MHz RISC processor
to microcodeable flexibility ...and the key is .5 Microns CMOS technology
developed by IBM and remember there are two chips, the 50 MHz RISC for
encoding and the 40MHz one for Decoding...
* Acts as video I/O interface
* Operates in real time on input video data
* Full compliance with MPEG-1 and 2 etc..
* Fully complian compressed MPEG-s video data stream
* Scalable architecture for future I-P-B encoding
* Field/Frame encoding microcode selectable
* 4:2:2 chroma fromat encoding in CCIR 601 resolution
* Direct real time encoding for YCbCr and RGB digital video sources
* CCIR 601 to HHr(Half Horizontal REsolution conversion and encoding
* color space conversion
* 4:2:2 to 4:2:0 conversion
* Automatic 3/2 pulldown inversion
* SCENE change DEtection
* Micro Controllabel features: adaptive quantization, motion
compensation, rate control
* PROGrammable encoding parameters including: Quantization Matrices, Scan
Pattern and MORE
* Direct interface to standard INEXPENSIVE DRAM
* .5 Microns CMOS 3.3 vollts

THe DECODER

* Dedicated real time hardware for MPEG-2 decompression
* Built in 40 MHz RISC processor microcodeable flexibility
* interested in the rest?
DisplaySubject: Re: A REVOLUTION!!!! REAL TIME CODEC MPEG-2!!!!! (fwd)