Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2005-02-01
2005-02-01
Liu, Shuwang (Department: 2634)
Pulse or digital communications
Receivers
Angle modulation
C375S324000, C375S354000, C375S355000
Reexamination Certificate
active
06850577
ABSTRACT:
A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange.
REFERENCES:
patent: 4285060 (1981-08-01), Cobb et al.
patent: 4617676 (1986-10-01), Jayant et al.
patent: 5119322 (1992-06-01), Stroobach
patent: 5329587 (1994-07-01), Morgan et al.
patent: 5339384 (1994-08-01), Chen
patent: 5353346 (1994-10-01), Cox et al.
patent: 5388127 (1995-02-01), Scarpa
patent: 5452289 (1995-09-01), Sharma et al.
patent: 5454015 (1995-09-01), Olafsson
patent: 5471470 (1995-11-01), Sharma et al.
patent: 5535271 (1996-07-01), Jangi et al.
patent: 5577041 (1996-11-01), Sharma et al.
patent: 5598468 (1997-01-01), Ammicht et al.
patent: 5600649 (1997-02-01), Sharma et al.
patent: 5661765 (1997-08-01), Ishizu
patent: 5694517 (1997-12-01), Sugino et al.
patent: 5764627 (1998-06-01), Sharma et al.
patent: 5790532 (1998-08-01), Sharma et al.
patent: 5790641 (1998-08-01), Chan et al.
patent: 5793498 (1998-08-01), Scholl et al.
patent: 5802117 (1998-09-01), Ghosh
patent: 5818929 (1998-10-01), Yaguchi
patent: 5852630 (1998-12-01), Langberg et al.
patent: 5859671 (1999-01-01), Kim
patent: 5970441 (1999-10-01), Mekuria
patent: 5987061 (1999-11-01), Chen
patent: 6023470 (2000-02-01), Lee et al.
patent: 6028679 (2000-02-01), Murphy
patent: 6125177 (2000-09-01), Whittaker
patent: 6141341 (2000-10-01), Jones et al.
patent: 6151636 (2000-11-01), Schuster et al.
patent: 6218896 (2001-04-01), Becker et al.
patent: 6233226 (2001-05-01), Gringeri et al.
patent: 6259677 (2001-07-01), Jain
patent: 6549587 (2003-04-01), Li
patent: WO 9726753 (1997-07-01), None
patent: WO 9728628 (1997-08-01), None
ETSI EN 300 973, Global System For Mobile Communications,Digital cellular telecommunications system(Phase 2+);Half rate speech; Voice Activity Detector(VAD)for half rate speech traffic channels;GSM 06.42 version 8.0.1 Release 1999); © 2000; pp. 1-22.
Mike Gray,FAX Technology Tutorial and Testing Issues,Agilent Technolgies, © 2000, pp. 1-20.
FAX Over IP Opportunities and Options,Natural MicroSystems, 7 sheets.
EIA/TIA-464-B, Requirements for Private Branch Exchange (PBX) Switching Equipment, “6 Signaling Requirements, 6.1 Network Signaling—Analog,” pp. 140-146.
Man Mohan Sondhi et al.,Silencing Echoes on the Telephone Network,Proceedings, of the IEEE, © Aug. 1980, vol. 68, No. 8, pp. 948-963.
Bell Communications Research,Dual-Tone Multifrequency Receiver Generic Requirements for End-to-End Signaling Over Tandam-Switched Voice Links,© Mar. 1987, Technical Reference TR-TSY-000181 Issue 1, 11 sheets.
Bell Communications Research,Impulse Noise Tape No. 201,Technical Reference TR-TSY-000762 Issue 1, © Jul. 1987, 4 sheets.
Bell Communications Research,Digit Simulation Test Tape,Technical Reference TR-TSY-00763 Issue 1, © Jul. 1987, 6 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Aspects of Digital Transmission Systems, Terminal Equipments,Pulse Code Modulation(PCM)of Voice Frequencies,ITU-T Recommendation, G. 711; © ITU1988, 1993; 8 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Transmission Systems, and Media, Apparatus Associated With Long-Distance Telephone Circuits and Other Terminal Equipments,Echo Suppressors,ITU-T Recommendation, G. 164; © ITU 1988, 1993; 36 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Aspects of Digital Transmission Systems, Terminal Equipments,7 kHz Audio-Coding Within 64 Kbit/s,ITU Recommendation; G. 722; © ITU 1988, 1993; 76 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Recommendations On Telephone Switching and Signalling, International Automatic and Semi-Automatic Working,Technical Features of Push-Button Telephone Sets,ITU-T Recommendation; Q. 23; © ITU 1988, 1993; 4 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Recommendations on Telephone Switching and Signalling, International Automatic and Semi-Automatic Working,Multifrequencey Push-button Signal Reception,ITU-T Recommendation, Q. 24; © ITU 1988, 1993; 7 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Data Communication Over the Telephone Network,300 Bits Per Second Duplex Modem Standardized For Use in The General Switched Telephone Network,ITU-T Recommendation V. 21; © ITU 1988, 1993; 7 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Data Communication Over the Telephone Network,4800/2400 Bits Per Second Modem Standardized For Use in The General Switched Telephone Network,ITU-T Recommendation, V.27 ter, © ITU 1988, 1993; 15 sheets.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, Data Communication Over the Telephone Network,9600 Bits Per Second Modem Standardized For Use On Point-To-Point 4-Wire Leased Telephone-Type Circuits,ITU-T Recommendation, V. 29; © ITU 1988, 1993; 17 sheets.
International Telecommunication Union, CCITT The International Telegraph and Telephone Consultative Committee, Data Communication Over the Telephone Network,Data Compression Procedures For Data Circuit Terminating Equipment(DCE)Using Error Correction Procedures,ITU-T Recommendation, V.42 bis; © ITU 1990; 29 sheets.
International Telecommunication Union, CCITT The International Telegraph and Telephone Consultative Committee, General Aspects of Digital Transmission Systems; Terminal Equipments,40, 32, 24, 16 kbit/s Adaptive Differential Pulse Code Modulation(ADPCM) ITU-T Recommendation, G.726; © 1990; 59 sheets.
International Telecommunication Union, CCITT The International Telegraph and Telephone Consultative Committee, General Aspects of Digital Transmission Systems; Terminal Equipments,5-, 4-, 3- And 2-bits Sample Embedded Adaptive Differential Pulse Code Modulation(ADPCM); Recommendation G. 727; ©ITU 1990; 57 sheets.
International Telecommunication Union, CCITT- The International Telegraph and Telephone Consultative Committee, Data Communication Over the Telephone Network,A 2-Wire Modem for Facsimile Applications With Rates up to 14 400 bit/s,Recommendation v. 17; © ITU 1991; 13 sheets.
Dennis R. Morgan et al., AT & T Bell Laboratories;A Multi-Tone Pseudo-Cascade Filtered-X LMS Adaptive Notch Filter,Proceedings of the IEEE International Conference in Acoustic Speech and Signal Processing, ICASSP 91, vol. 3 D, May 1991, Toronto, Ontario, Canada, pp. 2093-2096.
Panos E. Papamichalis, Texas Instruments, Inc.,Practical Approaches to Speech Coding,Prentice-Hall, Inc., Englewood Cliffs, New Jersey; 1992, pp. 163-167.
James Thi et al., AT & T Bell Laboratories;A Broadband Pseudo-Cascade Active Control System,Proceeding of the IEEE International Conference in Acoustic Speech and Signal Processing; © 1992, IEEE; pp. II-233-II-236.
International Telecommunication Union, ITU-T Telecommunication Standardization Sector of ITU, General Aspects of Digital Transmission Systems, Terminal Equipments,Coding of Speech at 16 kbit/s Using Low-delay Code Excited Linear Predic
Broadcom Corporation
Christie Parker & Hale LLP
Liu Shuwang
LandOfFree
Voice and data exchange over a packet based network with... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Voice and data exchange over a packet based network with..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voice and data exchange over a packet based network with... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3469561