gfavored
Nov 2003
BANNED
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plonk420,
Video CD 2.0
About two years after the Video CD 1.1 specification came out in,1993, an improved Video CD 2.0 standard was published in 1995. This one added the following items to the features already available in the Video CD 1.1 specification:
Support for MPEG segment play items (SPI), consisting of still pictures, motion pictures and/or audio (only) streams was added..
Support for interactive playback control (PBC) was added.
Support for playing related access by providing a scan point index file was added. (`/EXT/SCANDATA.DAT')
Support for closed captions.
Support for mixing NTSC and PAL content.
By adding PAL support to the Video CD 1.1 specification, the following resolutions became available:
352 x 240 @ 29.97 Hz (NTSC SIF).
352 x 240 @ 23.976 Hz (FILM SIF).
352 x 288 @ 25 Hz (PAL SIF).
For segment play items the following audio encodings became available:
Joint stereo, stereo or dual channel audio streams at 128, 192, 224 or 384 kbit/sec bit-rate.
Mono audio streams at 64, 96 or 192 kbit/sec bit-rate.
Also the possibility to have audio only streams and still pictures was provided. The bit-rate of multiplex-ed streams should be kept under 174300 bytes/sec (except for single still picture items) in order to accommodate single speed drives.
These specs you are speaking of are a decade old.
And were created for the hardware and technology of that time. Advances in technology doubles aproximately every 5 years, and the hardware of today have surpassed those standards, and in fact have demanded a standard of their own. A good example of this is the great importation of low-end DVD players, world wide from Asia, where VCD and SVCD are more common than DVD.
In 2000, the SVCD standard was created to accomadate this influx, for economical reasons and also the hardware of Western specifications and formats, ie: DVD's.
This is always the case, the advances in hardware will always demand a rewriting of the specifications to accommodate it.
The 1995 standards are near obsolete as is the hardware in which it was written for, you can expect a change within the specs., and only because the hardware will demand it from us, and is demanding it now. CBR was demanded by the single speed drives.
Anything that is written, ( software,programs, or even specs.) are written to accomodate the hardware, The hardware is not made for that which is written.
Change is a good thing.
I have talked too long, sorry,
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