WO1994013108B1 - In-band/out-of-band data transmission method and apparatus for a television system - Google Patents
In-band/out-of-band data transmission method and apparatus for a television systemInfo
- Publication number
- WO1994013108B1 WO1994013108B1 PCT/US1993/011648 US9311648W WO9413108B1 WO 1994013108 B1 WO1994013108 B1 WO 1994013108B1 US 9311648 W US9311648 W US 9311648W WO 9413108 B1 WO9413108 B1 WO 9413108B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- band
- channel
- video
- television
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract 33
- 230000001702 transmitter Effects 0.000 claims abstract 6
- 239000000969 carrier Substances 0.000 claims 7
- 238000003780 insertion Methods 0.000 claims 7
- 230000000051 modifying Effects 0.000 claims 7
- 238000011156 evaluation Methods 0.000 claims 3
- 238000011084 recovery Methods 0.000 claims 2
- 230000001172 regenerating Effects 0.000 claims 2
- 230000001419 dependent Effects 0.000 claims 1
- 230000001360 synchronised Effects 0.000 claims 1
Abstract
A method of data transmission for a cable television system comprises the steps of 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 in-band video data transmission, the method comprises the further steps of 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 (300) of the cable television system. Data transmission apparatus (100) comprises a data inserter (107a) for inserting in-band data in non-scrambled channels, an addressable data transmitter (140) for transmitting out-of-band and a scrambler (104) for inserting data in scrambled channels.
Claims
1. Apparatus for transmitting data in a television system comprising: a system control computer for determining lines of a vertical blanking interval for data insertion and for determining data to be inserted in the lines of the vertical blanking interval, a baseband video signal processing means, responsive to said system control computer, for removing equalizing pulses from the lines of the vertical blanking interval, and data insertion means predisposed to accept each of a plurality of different data streams for inserting data from one of the different data streams in the lines of the vertical blanking interval.
2. Data transmission apparatus according to claim 1 further comprising a data modulator for modulating data onto the sound carrier of a video signal.
3. Data transmission apparatus according to claim 1 wherein the different data streams include one of an off channel data stream, a barker channel data stream, pay-per-view channel data stream, a premium channel data stream, a scroll channel data stream, a message channel data stream, a basic channel programming guide data stream, a complete channel programming guide data stream, and a new services data stream.
4. Data transmission apparatus according to claim 1 wherein the data insertion means comprises storage means for storing a unique address.
5. Data transmission apparatus according to claim 1 wherein the data insertion means comprises an amplitude modulator means for amplitude modulating the baseband video signal.
6. Data transmission apparatus according to claim 1 wherein the data insertion means comprises a video multiplexer having a plurality of reference input signals of predetermined amplitude.
7. Data transmission apparatus according to claim 1 further comprising a data modulator for modulating data onto a data carrier at a frequency outside any band of frequencies for transmitting television signals.
8. Data transmission apparatus according to claim 1 wherein the removed equalizing pulses comprise at least one equalizing pulse occurring at twice a horizontal line frequency midway between equalizing pulses occurring at the horizontal line frequency and synchronous with horizontal pulses appearing in a succeeding field.
9. Data transmission apparatus according to claim 1 wherein the lines of the vertical blanking interval comprise at least one of lines seven, eight, or nine of a video field.
10. Data transmission apparatus according to claim 1 wherein each data stream includes identifying data to identify the data stream.
11. Data transmission apparatus according to claim 10 wherein said data insertion means includes a plurality of data inserters, each data inserter comparing the identifying data to prestored data and inserting the data stream which has identifying data which matches the prestored data into the lines of the vertical blanking interval.
12. Data transmission apparatus according to claim 11 wherein each of said data inserters comprises one of a television signal scrambler and a data inserter for inserting data into a non-scrambled television signal.
13. Apparatus for transmitting data in a subscription television system comprising: a system control computer for formatting data to be transmitted on an out-of-band data carrier as out-of-band data and for formatting the data to be transmitted as in-band audio data, a headend controller, coupled to said system control computer, for controlling the transmission of the formatted in-band audio data, a data inserter, responsive to said headend controller, for inserting the formatted in-band audio data as amplitude modulation of a selected sound carrier and transmitting the formatted in-band audio data, an out-of-band data transmitter, coupled to said system control computer, for transmitting the formatted out-of-band data, and a television terminal being adapted to receive the formatted in-band audio data and the formatted out-of-band data, the data reception not being dependent on the channel to which the terminal is tuned.
14. Data transmission apparatus according to claim 13 wherein the data inserter comprises a scrambler, the scrambler for scrambling a predetermined television channel.
15. Data transmission apparatus according to claim 14 wherein the data inserter comprises a data repeater coupled to the scrambler for inserting the in-band audio data on a sound carrier of a second predetermined television channel.
16. Data transmission apparatus according to claim 13 wherein the data inserter further comprises baseband video signal processing means for inserting data in portions of the baseband video signal not utilized for picture transmission as in-band video data.
17. Data transmission apparatus according to claim 16 wherein the in-band audio, in- band video and out-of-band data are formatted in similar manner for reception by the television terminal.
18. Apparatus for receiving data in a television system including a transmitter for transmitting in-band video and in-band audio data comprising means for receiving a television channel, means for recovering in-band video data received on the television channel, and means for recovering in-band audio data received on the television channel.
19. Apparatus for receiving data according to claim 18 further comprising means for receiving a second channel and means for recovering out-of-band data received on the second channel.
20. The apparatus for receiving data in a television system according to claim 18 wherein said in-band audio data recovering means recovers subscriber addressed communications.
21. The apparatus for receiving data in a television system according to claim 18 wherein said in-band video data recovering means is adaptable to recover a plurality of different data streams of in-band video data over the television channel.
22. The apparatus for receiving data in a television system according to claim 21 wherein the different data streams include one of an off channel data stream, a barker channel data stream, pay-per-view channel data stream, a premium channel data stream, a scroll channel data stream, a message channel data stream, a basic channel programming guide data stream, a complete channel programming guide data stream, and a new services data stream.
23. The apparatus for receiving data in a television system according to claim 19 wherein the second channel is a dedicated data channel.
24. A method of transmitting data in a television system to a plurality of terminal comprising the steps of: selecting in-band or out-of-band transmission means or both for transmitting data,
AMENDED SHEET {ARTICLE 19) if in-band transmission is selected, addressing data insertion means for inserting in-band video into a predetermined video channel, if out-of-band transmission is selected, transmitting out-of-band video data to an out-of- band video data transmitter for transmission, formatting the data to be transmitted in accordance with one of a plurality of predetermined formats, the formats being predetermined regardless of the form of data transmission selected, establishing a queue for in-band data transmission, and, if the queue is full, forwarding the preformatted in-band video data to an out-of-band transmitter for transmission.
25. A method of receiving data in a television system comprising the steps of receiving a television channel, recovering in-band video data from the received television data and recovering in-band audio data from the received television channel.
26. A data reception method according to claim 25 further comprising the steps of receiving a second channel and recovering out-of-band data from the second channel.
27. A method of receiving data according to claim 25 wherein the received television channel includes a baseband picture signal from which certain equalization pulses have been removed, the method comprising the further step of restoring the certain equalization pulses to the baseband picture signal.
28. A method of receiving data according to claim 25 comprising the preliminary step of determining an identify of a location of the in-band video data in the television channel in advance of television channel reception and in-band video data recovery.
29. A method of receiving data according to claim 25 wherein the in-band video data is received via a non-scrambled television channel.
30. A method of receiving data according to claim 25 wherein the in-band video data is recovered from predetermined lines of the vertical blanking interval of the baseband picture signal of the received television channel.
31. A method of receiving data according to claim 25 wherein the in-band video data is recovered according to a predetermined data pattern within a data window following a beginning of horizontal sync.
32. A method of receiving data according to claim 25 wherein the in-band video data is recovered from the horizontal blanking interval of the baseband picture signal of the received television channel.
33. A method of receiving data according to claim 25 wherein the in-band video data is received via a non-scrambled television channel.
34. A method of receiving data according to claim 25 wherein the in-band video data is recovered from predetermined lines of the vertical blanking interval of the baseband picture signal of the received television channel.
35. A method of receiving data according to claim 25 wherein the in-band video data is recovered according to a predetermined data pattern within a data window following a beginning of horizontal sync.
36. A method of receiving data according to claim 25 wherein the in-band video data is recovered from the horizontal blanking interval of the baseband picture signal of the received television channel.
37. A method of receiving data according to claim 36 wherein the in-band video data is recovered according to a predetermined data pattern within a data window following a beginning of horizontal sync.
38. The method of receiving data in a television system according to claim 25 wherein the step of recovering in-band audio data includes recovering subscriber addressed communications.
39. The method of receiving data in a television system according to claim 25 wherein the step of recovering in-band video data includes adapting to recover a plurality of different data streams of in-band video data over the television channel.
40. The method of receiving data in a television system according to claim 39 wherein the different data streams include one of an off channel data stream, a barker channel data stream, pay-per-view channel data stream, a premium channel data stream, a scroll channel data stream, a message channel data stream, a basic channel programming guide data stream, a complete channel programming guide data stream, and a new services data stream.
41. The method of receiving data in a television system according to claim 26 wherein the second channel is a dedicated data channel.
42. Data transmission apparatus for a television system comprising a video multiplexer for receiving an input baseband video signal and a plurality of other input signals including, but not limited to, at least two signals at different predetermined voltage levels, the video multiplexer comprising at least two output control leads for selecting among the input signals for output, the video multiplexer providing an output baseband video signal including in-band video data.
43. Data transmission apparatus according to claim 42 wherein the two signals at different predetermined voltage levels include an 0 IRE signal and a less than 100 IRE signal.
44. Data transmission apparatus according to claim 42 wherein the two signals at different predetermined voltage levels include a 0 IRE signal and a signal level between -40 and -50 IRE.
45. 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.
46. Apparatus for receiving in-band video data of a television channel comprising, synchronization means for determining a beginning of horizontal synchronization, gate establishing means for determining a first time interval related to the beginning of horizontal synchronization, level evaluation means for evaluating signal level during the first time interval, data window establishing means for establishing a second time interval related to the beginning of horizontal synchronization, and data recovery means for recovering data from the second time interval at signal levels related to the level determined by the level evaluation means.
47. A method for receiving in-band video data of a television channel at a television terminal comprising the steps of: determining a beginning of horizontal synchronization, establishing a first time interval related to the beginning of horizontal synchronization, evaluating the signal level during the first time interval, establishing a second time interval related to the beginning of horizontal synchronization, and recovering data from the second time interval at signal levels related to the level determined during the signal level evaluation step.
48. A method as recited in claim 47 further comprising the steps of qualifying the data as a first or second type, gating data of the first type to a descrambling circuit, and storing data of the second type.
49. A method as recited in claim 47 further comprising the step of regenerating any removed equalizing pulses.
50. A method as recited in claim 47 further comprising the step of regenerating any removed portions of the horizontal blanking interval.
51. A method as recited in claim 47 in which certain predetermined in-band video data is to be forwarded by the terminal, further comprising the step of qualifying the in-band video data from active picture video and from the certain predetermined in-band video data to be forwarded by their expected amplitude, frequency position and pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU56839/94A AU5683994A (en) | 1992-12-01 | 1993-12-01 | In-band/out-of-band data transmission method and apparatus for a television system |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US98376692A | 1992-12-01 | 1992-12-01 | |
| US07/983,766 | 1992-12-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1994013108A1 WO1994013108A1 (en) | 1994-06-09 |
| WO1994013108B1 true WO1994013108B1 (en) | 1994-07-21 |
Family
ID=25530083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1993/011648 WO1994013108A1 (en) | 1992-12-01 | 1993-12-01 | In-band/out-of-band data transmission method and apparatus for a television system |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1092586A (en) |
| AU (1) | AU5683994A (en) |
| IL (1) | IL107825A (en) |
| WO (1) | WO1994013108A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0153824B1 (en) * | 1995-03-16 | 1998-11-16 | 김영환 | Distribution type subscriber indoor apparatus for an optic cable tv |
| US7082398B1 (en) | 1996-01-16 | 2006-07-25 | The Nasdaq Stock Market, Inc. | Media wall for displaying financial information |
| CN100384250C (en) * | 2000-02-24 | 2008-04-23 | 北京华诺信息技术有限公司 | Method and device for inserting data to and extracting data from analog TV baseband signal |
| AU2003253956A1 (en) * | 2002-07-15 | 2004-02-02 | Integra5 Communication Inc. | Context aware transmission management method |
| AU2003259338A1 (en) * | 2002-08-21 | 2004-03-11 | Lime Studios Limited | Improvements to interactive tv games system |
| CN102131104A (en) * | 2011-03-22 | 2011-07-20 | 中广传播集团有限公司 | Method for scrambling service |
| CN107273091B (en) * | 2016-04-08 | 2020-11-10 | 佛山市顺德区顺达电脑厂有限公司 | System and method for issuing non-in-band data format instruction in-band data environment |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319273A (en) * | 1979-10-26 | 1982-03-09 | Rca Corporation | Television signal with encoded synchronizing signals |
| JPS57500537A (en) * | 1980-03-31 | 1982-03-25 | ||
| US4335402A (en) * | 1980-07-01 | 1982-06-15 | Rca Corporation | Information transmission during first-equalizing pulse interval in television |
| US4568974A (en) * | 1982-10-28 | 1986-02-04 | Oak Industries Inc. | Video scrambling by the application of a variable periodic scrambling waveform |
| JPS59152786A (en) * | 1983-02-18 | 1984-08-31 | Sanyo Electric Co Ltd | Scrambling system in catv broadcast |
| US4620227A (en) * | 1984-01-30 | 1986-10-28 | Cybernetic Data Products | Data decoder |
| US4890319A (en) * | 1984-09-21 | 1989-12-26 | Scientific-Atlantic, Inc. | Method for controlling copying of protected information transmitted over a communications link |
| US4815129A (en) * | 1985-01-02 | 1989-03-21 | General Instrument Corp. | Video encryption system |
| US4914694A (en) * | 1988-04-11 | 1990-04-03 | Eidak Corporation | Modifying a television signal to inhibit recording/reproduction |
| US5058160A (en) * | 1988-04-29 | 1991-10-15 | Scientific-Atlanta, Inc. | In-band controller |
| US4924498A (en) * | 1988-04-29 | 1990-05-08 | Scientific Atlanta, Inc. | Method and apparatus for improving video scrambling and employing split snyc pulses |
| US4991011A (en) * | 1988-12-23 | 1991-02-05 | Scientific-Atlanta, Inc. | Interactive television terminal with programmable background audio or video |
| US4994908A (en) * | 1988-12-23 | 1991-02-19 | Scientific-Atlanta, Inc. | Interactive room status/time information system |
| JP2697231B2 (en) * | 1990-03-12 | 1998-01-14 | 松下電器産業株式会社 | CATV system |
| US5140420A (en) * | 1990-10-05 | 1992-08-18 | General Electric Company | Information in vertical blanking interval of video sync signal |
| US5257396A (en) * | 1991-09-17 | 1993-10-26 | Zenith Electronics Corporation | Dual in-band/out-of-band CATV system |
| US5223930A (en) * | 1991-10-18 | 1993-06-29 | Zenith Electronics Corporation | Data recovery system using dot clock counting |
| US5247364A (en) * | 1991-11-29 | 1993-09-21 | Scientific-Atlanta, Inc. | Method and apparatus for tuning data channels in a subscription television system having in-band data transmissions |
-
1993
- 1993-12-01 WO PCT/US1993/011648 patent/WO1994013108A1/en active Application Filing
- 1993-12-01 CN CN93121704.0A patent/CN1092586A/en active Pending
- 1993-12-01 IL IL10782593A patent/IL107825A/en not_active IP Right Cessation
- 1993-12-01 AU AU56839/94A patent/AU5683994A/en not_active Abandoned
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