CB06049@uafsysb.bitnet (Colin Byers) (10/07/89)
I have been reading in the Sept 25, 1989 Communications Week on page 74 about the latest sound improvement for ISDN from AT&T. My questions are: 1) How does making a 7khz signal improve the sound quality ? (I know about bandwidth but thought someone could go into more depth than the article covered...) 2) Why is getting a switched 56-kbps line so expensive relative to say a 64-kbps line? 3) What difficulties are preventing Bell from implementing this? Thanks again, Colin Acknowledge-To: <CB06049@UAFSYSB>
vtaft@hpindda.hp.com (Vladimir Taft) (10/14/89)
7 kHz audio standard uses a more sophisticated encoding algorithm which provides better quality than the older standard (8-bit PCM) at the same bit rate of 64 Kbps. As far as the rest of your questions - sorry, I have not seen the article. Vladimir Taft