EP 0377687 A4 19910911 - SPECTRALLY EFFICIENT METHOD FOR COMMUNICATING AN INFORMATION SIGNAL
Title (en)
SPECTRALLY EFFICIENT METHOD FOR COMMUNICATING AN INFORMATION SIGNAL
Publication
Application
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
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