Method and apparatus for TV broadcasting

• US 4,975,771 A
• Filed: 12/18/1989
• Issued: 12/04/1990
• Est. Priority Date: 02/10/1989
• Status: Expired due to Term

• Current Assignee: Orbsak LLC
• Original Assignee: Salim A. Kassatly
• Inventors: Kassatly, Salim A.
• Primary Examiner(s): Shepperd, John W.
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US07/457,403
• Time in Patent Office: 351 Days
• Field of Search: 358/86, 358/142, 358/146, 358/181, 455/3, 455/69, 455/88, 370/109, 370/118
• US Class Current: 348/469
• CPC Class Codes: H04N 21/2365 Multiplexing of several video streams
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/4347 Demultiplexing of several video streams
• CPC Class Codes: H04N 7/08 Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band , e.g. by time division H04N7/007 takes precedence
• CPC Class Codes: H04N 7/0806 the signals being two or more video signals H04N7/0803, H04N7/081 take precedence
• CPC Class Codes: H04N 7/15 Conference systems
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8227 the additional signal being at least another television signal

Abstract

A video broadcasting method and apparatus. The broadcasting method generally includes the steps of selecting one or more channels from a plurality of available channels, and scanning the selected channels for generating signals identifying these selected channels. The channel identifying signals are then fed back to a transmitter unit over a first carrier frequency. The feedback signals are used to selectively identify the channels to be transmitted. The signals from the selected channels are compressed, multiplexed and transmitted over a second carrier frequency to a reception unit, where the signals are demultiplexed and separated into separate channels, and stored for a predetermined period of time. The separated signals are then decompressed, reconstructed and displayed on a real-time basis.

Claims

1. A video broadcasting method comprising the steps of:

(a) selecting one or more channels from a plurality of available channels;

(b) scanning said selected channels for generating signals identifying said selected channels;

(c) feeding back said channel identifying signals to a transmitting means over a first carrier frequency;

(d) using said feedback signals for selectively identifying the channels to be transmitted;

(e) compressing and multiplexing signals from said selected channels over a second carrier frequency;

(f) transmitting only said multiplexed signals;

(g) receiving said multiplexed signals;

(h) demultiplexing and separating said received signals into separate channels;

(i) storing the separated signals for a predetermined period of time;

(j) decompressing and reconstructing the signals of the selected channel on a real-time basis; and

(k) displaying the reconstructed signals of the selected channel on a real-time basis.

2. The method as defined in claim 1 further wherein said step of storing includes the step of storing said separated channels for a period of n.(T-1) if the compressed signals of the selected channels have substantially similar sampling periods, where n represents the number of channels that have been initially selected by a user, and T represents the sampling period of the compressed signals over one channel.

3. The method as defined in claim 1 further wherein said step of storing includes the step of storing said separated channels for a period substantially equal to ##EQU2## Ti if the compressed signals of the selected channels do not have substantially similar sampling periods, where n represents the number of channels that have been initially selected by a user, and Ti represents the sampling periods of the compressed signals over the selected channels.

4. A video broadcasting apparatus comprising:

(a) first means for selecting one or more channels from a plurality of available channels;

(b) means for scanning said selected channels to generate signals identifying said selected channels;

(c) means for feeding back said channel identifying signals to a transmitting means over a first carrier frequency;

(d) means for using said feedback signals to selectively identify the channels to be transmitted;

(e) means for compressing and multiplexing signals from said selected channels over a second carrier frequency;

(f) for transmitting only said multiplexed signals;

(g) first means for receiving said multiplexed signals;

(h) first means for demultiplexing and separating said received signals into separate channels;

(i) first means for storing the separated signals for a predetermined period of time;

(j) first means for decompressing and reconstructing the signals of the selected channel on a real-time basis; and

(k) first means for displaying the reconstructed signals of the selected channel on a real-time basis.

5. The apparatus as defined in claim 4 further including:

(a) second means for selecting one or more channels from a plurality of available channels;

(b) second means for receiving said multiplexed signals;

(c) second means for demultiplexing and separating said received signals into separate channels;

(d) second means for storing the separated signals for a predetermined period of time.,

(e) second means for decompressing and reconstructing the signals of the selected channel on a real-time basis; and

(f) second means for displaying the reconstructed signals of the selected channel on a real-time basis.

6. The apparatus as defined in claim 5, wherein said first means for selecting, receiving, demultiplexing, storing, decompressing and displaying are disposed remotely from said second means for selecting, receiving, demultiplexing, storing, decompressing and displaying.

7. The apparatus as defined in claim 5, wherein said first and second carrier frequencies are selected so as to avoid undesirable interference between the feedback signals and the transmitted signals.