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Re: [ARSCLIST] Dolby B, et al and now ANRS
At 05:50 AM 2007-10-27, Tom Fine wrote:
If I remember correctly, ANRS was proprietary to
JVC and was somewhat Dolby B compatible although
I think it was some way JVC worked around Dolby
patents. I forgot if JVC decks from that era had
ANRS and Dolby B. The only definitive answer
will come from someone who has been around a
while in JVC's engineering department. Perhaps
start with the Tokyo AES chapter?
There are some AES papers that mention ANRS -- I
would search at www.aes.org and go to the library
and search for "ANRS" -- I checked briefly and
there may even be a paper that describes it.
There are 19 citations in the index and here are
what appear at first glance to be the most
interesting. The remainder mostly referred to
carrier-based quadraphonic discs--the RCA CD-4 system.
I think these are available for $5 each for AES
members. I bought the now out-of-print CD set a few years ago.
<http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fjrnl6877%2F1973%2F7195%2Epdf&doctype=raw&Collection=C2docfile=jrnl6877/1973/7195.pdf#xml=http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fjrnl6877%2F1973%2F7195%2Epdf&doctype=xml&Collection=C2&QueryZip=ANRS&;>A
New Automatic Noise-Reduction System (ANRS) 402602 bytes (CD aes3)
Author(s): Yamazaki, Masami; Masuda, Isao
Publication: Volume 21 Number 6 pp. 445·449; July 1973
Abstract: A new noise-reduction system, suitable
for use with high-quality cassette tape
recorders, is described. The signals of low level
are compressed in the recording process and
expanded in a complementary way during playback
in order to reduce noise without altering the
tonal quality of the original sound. In this
process, however, the hissing noise inherent in
tape recording in the region of 5 kHz, is reduced by approximately 10 dB.
<http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fpp7680%2Fpp7903%2F1538%2Epdf&doctype=raw&Collection=C8docfile=pp7680/pp7903/1538.pdf#xml=http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fpp7680%2Fpp7903%2F1538%2Epdf&doctype=xml&Collection=C8&QueryZip=ANRS&;>Automatic
Characteristics Setting in the Compact Cassette Player 692586 bytes (CD aes9)
Author(s): Kitamura, M.; Onoye, H.; Shimizu, H.
Publication: Preprint 1436; Convention 62; March 1979
Abstract: In recent year, there have been major
improvements in magnetic recording tape,
culminating in metal tape which makes the
performance of cassette tape decks almost equal
to that of open-reel equipment. However, this
progress in magnetic tape technology requires
that the bias and equalization of the tape deck
be switchable and that users must operate the
switches according to the characteristics of the
tape being used. As the cassette format has
become more popular, it is widely used, even by
professionals and audiophiles. Naturally, it is
necessary that the operation of cassette tape
decks be simplified, so that people can get the
best possible performance from the tape they are
using. JVC has conducted research into the
development of a cassette deck which meets these
requirements and has succeeded in developing a
deck which, although it is simple to operate,
automatically adjusts its recording
characteristics to match those of the tape.
<http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fjrnl6877%2F1977%2F7511%2Epdf&doctype=raw&Collection=C2docfile=jrnl6877/1977/7511.pdf#xml=http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fjrnl6877%2F1977%2F7511%2Epdf&doctype=xml&Collection=C2&QueryZip=ANRS&;>Studios
and Studio Equipment 1230009 bytes (CD aes3)
Author(s): Borwick, John
Publication: Volume 25 Number 10/11 pp. 689·695; October 1977
Abstract: Today's sound studios are constructed
and equipped to provide a wealth of manipulative
freedoms undreamed of by the pioneers of
recording and broadcasting. As techniques and
technology continue to develop at unrelenting
speed, engineers and producers have a
responsibility to define their artistic
objectives. Only then will the huge capital
expenditure in acoustic design and electronic control of frequency, dynamic,
time, and spatial effects be reflected in better sounds reaching the listener.
<http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fjrnl6877%2F1977%2F7463%2Epdf&doctype=raw&Collection=C2docfile=jrnl6877/1977/7463.pdf#xml=http://127.0.0.1:8080/vtopic.isapi?action=View&VdkVgwKey=%2E%2E%2Fjrnl6877%2F1977%2F7463%2Epdf&doctype=xml&Collection=C2&QueryZip=ANRS&;>A
Dynamic Noise Reducer for Sum-Difference
Multiplex Systems 418405 bytes (CD aes3)
Author(s): Cabot, Richard C.
Publication: Volume 25 Number 3 pp. 95·98; March 1977
Abstract: A means of reducing the apparent noise
in systems employing sum-difference multiplexing
with no alteration of frequency response is
presented. The method takes interchannel
separation a function of program level,
exchanging separation for an improved
signal-to-noise ratio at low volume levels. The
psychoacoustic and electronic principles behind
its operation and the qualitative results of
listening tests on several versions are given.
Cheers,
Richard
Richard L. Hess email: richard@xxxxxxxxxxxxxxx
Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.