* Anthony Lalande [EMAIL PROTECTED] on Thu, 11 Jan 2001
| Does any loseless compression algorithm require the entire set of data for
| read access before it begins compression?
No. In fact none do. Conventional compression algorithms operate on
fixed-size blocks of data. Real-time
No. In fact none do. Conventional compression algorithms operate on
fixed-size blocks of data. Real-time compression of an audio stream is
easilly possible with a bit of buffering. The issue is not that but
compressing fast enough so that the buffer is not overrun.
Well, in effect, the
* Anthony Lalande [EMAIL PROTECTED] on Fri, 12 Jan 2001
| I'm wondering if you would get better compression by treating the whole
| stream as 1 block, and then compressing that, or compression in many smaller
| blocks. I guess it all depends on the compression used.
All data compression
32-64K blocks is the norm for high-level compression these days. That is
what bzip2 uses, and boy is it slow even on a fast Pentium-III. One minute
of linear PCM is ~8.75MB. You would need a supercomputer the size of a
refrigerator to utilize a block size that large.
Well, I can go to
Does any loseless compression algorithm require the entire set of data for
read access before it begins compression? If you wanted to encode audio with
a loseless compression, could you do it in real-time or would you need to
wait until the entire recording is complete, and then compress
