US5497187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In-band/out-of-band data transmission method and apparatus for a television system
Assignee: Cisco Technology Inc
•
Filing: 1994-12-22
•
Granted: 1996-03-05
•
Expires: 2014-12-22
Abstract
Abstract Data transmission for a cable television system includes transmitting data via a plurality of signals including, but not limited to, in-band audio, in-band video, and out-of-band signals. The in-band data signals are transmitted on scrambled or non-scrambled channels. In-band video data transmission further includes selecting certain lines of the vertical blanking interval for in-band video data transmission, omitting certain equalizing pulses during the selected lines and inserting in-band video data during the selected lines. The several data signals, in-band and out-of-band, have compatible transaction formats to facilitate decoding and data storage processes at a subscriber terminal of the cable television system. A data transmission apparatus includes a data inserter for inserting in-band data in non-scrambled channels, an addressable data transmitter for transmitting out-of-band data and a scrambler for inserting data in scrambled channels.
Inventors
- 👤 Robert O. Banker
- 👤 Steven R. Yothment
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:03
CPC Classifications
H; H04; H04N; H04N21/00; H04N21/40; H04N21/47; H04N21/478; H04N21/4786; H04N21/41; H04N21/4104; H04N21/4112; H04N21/472; H04N21/47214; H04N21/4788; H04N21/482; H04N7/00; H04N7/08; H04N7/081; H04N7/087; H04N7/088; H04N7/0884; H04N7/10; H04N7/16; H04N7/162; H04N7/165; H04N7/167; H04N7/1675; H04N21/485; H04N21/488; H04N5/00; H04N5/44; H04N5/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
Data transmission apparatus for a television system comprising a system controller for formatting a plurality of transactions to be transmitted to subscriber terminals, the transactions to be transmitted comprising in-band video data, in-band audio data and out-of-band data, at least one in-band data inserter for transmitting data in a predetermined video channel comprising an audio carrier and a video picture carrier and an out-of-band data transmitter for transmitting out-of-band data, the transactions being of different types and having variable lengths, a first type of transaction having at least one transaction code and comprising a predetermined number of bytes between twelve and thirty-six where the predetermined number is M, a second type of transaction comprising a predetermined number of bytes between sixteen and forty-eight where the predetermined number is N, and a third type of transaction comprising a predetermined number of bytes between twenty-four and seventy-two, where the predetermined number of bytes is a multiple of M or N.
Claim 2
Dependent Claim
158 words
Data transmission apparatus for a television system comprising a system controller for formatting a plurality of transactions to be transmitted to subscriber terminals, the transactions to be transmitted comprising in-band video data, in-band audio data and out-of-band data, at least one in-band data inserter for transmitting data in a predetermined video channel comprising an audio carrier and a video picture carrier and an out-of-band data transmitter for transmitting out-of-band data, the transactions being of different types and having variable lengths, a first type of transaction having at least one transaction code and comprising a predetermined number of bytes between twelve and thirty-six where the predetermined number is M, a second type of transaction comprising a predetermined number of bytes between sixteen and forty-eight where the predetermined number is N, and a third type of transaction comprising a predetermined number of bytes between twenty-four and seventy-two, where the predetermined number of bytes is a multiple of M or N.
Claim 3
Dependent Claim
28 words
The data transmission apparatus according to claim 1, wherein said second predetermined number of bytes is 1.5 to 2 times greater than said first predetermined number of bytes.
Claim 4
Dependent Claim
15 words
The data transmission apparatus according to claim 1, wherein M and N are even numbers.
Claim 5
Dependent Claim
14 words
The data transmission apparatus according to claim 1, wherein N is greater than M.
Claim 6
Dependent Claim
24 words
The data transmission apparatus according to claim 4, wherein the predetermined number of bytes of the third transaction type ranges from 2M to 8N.
Claim 7
Dependent Claim
50 words
The data transmission apparatus according to claim 1, wherein the transactions includes a fourth type of transaction comprising a predetermined number of bytes, the predetermined number of bytes being a multiple of M or N and being greater than the predetermined number of bytes of the third type of transaction.
Claim 8
Dependent Claim
30 words
The data transmission apparatus according to claim 6, wherein the predetermined number of bytes for the fourth transaction type ranges from 2M to 8N, where N is greater than M.
References Cited (Backward Citations)
GB1147604A
Cited
US4319273A
Cited
US4536791A
Cited
US4567517A
Cited
US4618888A
Cited
US4553161A
Cited
US4890319A
Cited
US4815129A
Cited
US5058160A
Cited
WO1989010664A1
Cited
US4924498A
Cited
US4991011A
Cited
US4994908A
Cited
US5054071A
Cited
US5161187A
Cited
US5091938A
Cited
US5091938B1
Cited
US5140420A
Cited
US5257396A
Cited
US5247364A
Cited
US5301028A
Cited
US5317391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |