Global Patent Index - EP 0377687 A4

EP 0377687 A4 19910911 - SPECTRALLY EFFICIENT METHOD FOR COMMUNICATING AN INFORMATION SIGNAL

Title (en)

SPECTRALLY EFFICIENT METHOD FOR COMMUNICATING AN INFORMATION SIGNAL

Publication

EP 0377687 A4 19910911 (EN)

Application

EP 89904890 A 19890403

Priority

  • US 18768588 A 19880429
  • US 18776688 A 19880429

Abstract (en)

[origin: WO8910661A1] According to the invention, an information signal is sampled, quantized and processed digitally through an information encoder (100). Digitally processed samples (1104, 1106) produced by the encoder (100) are modulated onto a communication channel to create channel symbols having a magnitude of modulation proportional to a characteristic of a respective digitally processed sample. Both a radio frequency (RF) transmission embodiment, and a wireline embodiment are provided. In a final aspect of the present invention, encryption (1101) is provided to ensure communication privacy.

IPC 1-7

H04B 14/04

IPC 8 full level

H04L 27/00 (2006.01); H04B 1/66 (2006.01); H04B 14/04 (2006.01); H04K 1/02 (2006.01); H04L 9/10 (2006.01)

IPC 8 main group level

H04B (2006.01)

CPC (source: EP KR)

H02M 3/335 (2013.01 - KR); H04B 1/667 (2013.01 - EP); H04B 14/04 (2013.01 - KR); H04K 1/02 (2013.01 - EP)

Citation (search report)

  • [A] IBM TECHNICAL DISCLOSURE BULLETIN, vol. 26, no. 10B, March 1984, pages 5332-5335, New York, US; D.R. IRVIN: "TDHS preprocessing compression selectively applied to sub-band speech coders"
  • [A] RUNDFUNKTECHNISCHE MITTEILUNGEN, vol. 18, no. 3, 1974, pages 160-164, Norderstedt, DE; G.-G. GASSMANN: "Verbesserung der AM-Übertragungsqualität bei unveränderter Systembandbreite"
  • See references of WO 8910661A1

Designated contracting state (EPC)

AT BE CH DE FR GB IT LI LU NL SE

DOCDB simple family (publication)

WO 8910661 A1 19891102; CN 1038003 A 19891213; EP 0377687 A1 19900718; EP 0377687 A4 19910911; FI 896174 A0 19891221; IL 89672 A0 19890928; IL 89672 A 19940412; JP H03500118 A 19910110; KR 900701082 A 19900817; KR 920007093 B1 19920824

DOCDB simple family (application)

US 8901345 W 19890403; CN 89102988 A 19890428; EP 89904890 A 19890403; FI 896174 A 19891221; IL 8967289 A 19890320; JP 50474089 A 19890403; KR 890702478 A 19891228