Telecommunication system with frame selected continuous audio signals

Patent 4780757 Issued on October 25, 1988. Estimated Expiration Date:

March 9, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3493674

3746780

Data communication system
Patent #: 4500751
Issued on: 02/19/1985
Inventor: Darland , et al.

Videotex system
Patent #: 4578535
Issued on: 03/25/1986
Inventor: Simmons

Video subsystem for a hybrid videotex facility
Patent #: 4616263
Issued on: 10/07/1986
Inventor: Eichelberger

Cable stereo apparatus
Patent #: 4698670
Issued on: 10/06/1987
Inventor: Matty

Cable television system selectively distributing pre-recorded video and audio messages Patent #: 4734764
Issued on: 03/29/1988
Inventor: Pocock , et al.

Inventors

Assignee

GTE Government Systems Corporation

Application

No. 07/166064 filed on 03/09/1988

US Classes:

725/144, Headend348/107, With record location348/484, Sound signal725/114, Server or headend725/131, Receiver (e.g., set-top box)725/151, Receiver (e.g., set-top box)725/87Video-on-demand

Examiners

Primary: George, Keith E.

Attorney, Agent or Firm

Yeo; J. Stephen

International Classes

H04N 7/088 (20060101)
H04N 7/035 (20060101)
H04N 7/087 (20060101)
H04N 7/025 (20060101)
H04N 1/00 (20060101)

Abstract

A telecommunication system has a facility and an addressable terminal coupled through a transmission medium. The facility includes means for providing addressed video frames containing information corresponding to still images and for providing addressed audio frames containing information corresponding to audio bursts. There is also provided for non-addressed signals containing information corresponding to at least two channels of continuous audio. A selection code is inserted in one or more of the frames. The addressed video and audio frames and non-addressed signals are coupled to the transmission medium to the addressable terminal. The terminal has means for detecting said addressed video frames, addressed audio frames, and non-addressed signals. Circuits select video frames and audio frames in response to their corresponding addresses. One of said continuous audio channels is selected in response to said selection code.

Other References

NHK (Japan Broadcasting Corporation) "Present Status of Still-Picture Television"; May 1978
Berg, "Dialoog TV; Kabelexperiment Zuid-Limburg", I² -Elektrotechniek/Elektronica-No. 4-1986, pp. 35-39