24/06/2005 - Controller General of Patents, Designs, and Trade Marks

(12) PATENT APPLICATION PUBLICATION
(19)
INDIA (21) Application No: 586/MUMNP/2004 A
(22) Date of filing of Application : 19/10/2004
(43) Publication Date: 24/06/2005
(54) Title of the invention: METHODS AND SYSTEMS FOR DIGITAL DATA TRANSMISSION.
(51) International Classification: H 04 L 27/26 (71)
(31) Priority Document No. : PCT/RU02/
00101
(32) Priority Date : 20/03/2002
(33) Name of priority country :
(86)
RUSSIA
International Application : PCT/RU02/
00101
No. and Filing Date : 20/03/2002
(87) International :
Publication No. WO03/079
625 A1
(61)
(62)
Patent of addition to
Application No. : NIL
Filed on N.A.
Divisional to
Application No. : NIL
Filed on : N.A.
Name of the Applicant:
1. DOUNAEV IGOR BORISOVICH
2. LETOUNOV LEONID ALEXEEVICH
Address of the Applicant:
1. UL GOGOLYA, 14A-48, KHIMKI,
MOSKOVSKAYA OBL 141400,
RUSSIAN FEDERATION.
2. MZHK “SOLNECHNY”, 2-105,
GOMEL, 246050, BELARUS.
Name of the Inventors:
- IDEM -
Filed U/S 5(2) before the
Patents (Amendment)
Ordinance,2004 : NO
(57) Abstract : The inventive methods and systems for digital data transmission using a communication
path which comprises analog communication lines and a pulse-code modulation channel (PCM). Said
method and systems make it possible to increase a data transmission rate through the entire communication
path in such a way that it is equal to the data transmission rate of the PCM channel irrespective of the
quality of used analog communication lines. The spectrum of a signal transmitted by an analog transmission
line is selected such that the data transmission rate of said transmission line is equal to the data transmission
rate of the PCM channel, and the number of data quantisation levels transmitted by the analog transmission
line is as low as possible for said analog communication line. In order to convert an analog signal into an
PCM channel signal, the analog-signal frequency is decreased proportionally the ratio between the number
of data quantisation levels transmitted by a PCM channel and the number of data quantisation levels
transmitted by the analog communication line.
( Figure: NIL )
Total Pages : 26.
The Patent Office Journal 24.06.2005 17939