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A/V compression
>
> This brings up a fun concept: encrypted digital video and audio.
> Would it be hard to do IDEA encryption at the standard CD rate?
> There are schemes to compress video to that rate--how available
> are they? How much investment in equipment and crunch time do
> you need? How easy is it to interrupt the bit streams in and out
> of a DAT recorder? How cheap is the decoder?
>
I picked this up off the net a while ago. Sounds like the CL451 might
be programmable to do encryption/decryption, too.
Background: MPEG is a compression standard for compressing VHS-quality
video and stereo audio into a 1.5Mbit/s stream.
If anyone's interested in funding/collaborating on a project involving
this, let's talk.
---
>From [email protected] Fri Jul 10 21:06:25 1992
>Relay-Version: version Notes 2.8.4 1990/05/09; site hprpcd.rose.hp.com
>From: [email protected] (TAN JIN MENG)
>Date: Sat, 11 Jul 1992 04:06:25 GMT
>Date-Received: Sun, 12 Jul 1992 01:35:12 GMT
>Subject: NEW MPEG I CHIP
>Message-ID: <[email protected]>
>Organization: National University of Singapore
>Path: hprpcd!hprdash!hpergfg2!hpda!hpcc05!hplextra!hpscdc!sdd.hp.com!nigel.msen.com!yale.edu!jvnc.net!nuscc!eletanjm
>Newsgroups: comp.multimedia
>Lines: 23
>
>Has anyone seen a demo or read about the new MPEG chipset from C-Cube
>systems?
>
>I heard it's great!
>
>Some facts I know (or think I know)
>
>* CL450 - is a decoder only
>* CL451 - due out later this year is full encoder/decoder codec
>* core is a RISC based processor with 36bit bus splittable into
> 4 data streams. 4 separate acc/mul units (ie SIMD).
>* Can stream a full resolution video at ISA bus rates.
>* Microcode and C compiler development kit.
>* CL451 currently runs at 66MHz using fairly old .8 micron
> technology ==> we can expect to see even higher speed devices.
>* CL451 is pipelinable - ie can put multiple CL451 in tandem to
> perform any amount of processor intensive activities. (eg real
> time edge/motion detection, special effects etc).
>* CL451 is a single chip solution. Just add VRAM.
>
>* Largest demand so far - for Karaoke!! C-Cube has Jap. backers.
>
>jin meng
>
>
>
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Robert Brooks ~
~ Hewlett Packard Company ~
~ [email protected] ~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~ Robert Brooks ~
~ Hewlett Packard Company ~
~ [email protected] ~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~