Fixed video-on-demand

• US 5,724,646 A
• Filed: 06/15/1995
• Issued: 03/03/1998
• Est. Priority Date: 06/15/1995
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: International Business Machines Corporation
• Inventors: Ruiz, Antonio, Herzberg, Louis Paul, Willner, Barry Edward, Ganek, Alan George
• Primary Examiner(s): Burgess, Glenton B.
• Application Number:
  US08/490,747
• Time in Patent Office: 992 Days
• Field of Search: 348/7, 348/12, 348/13, 348/6, 455/4.2, 455/5.1, 455/3.1
• US Class Current: 725/89
• CPC Class Codes: H04N 21/47202 for requesting content on demand, e.g. video on demand
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests
• CPC Class Codes: H04N 7/17336 Handling of requests in head-ends

Abstract

A system, method and apparatus for Video-on-demand (VOD) satisfying the desire of `surfers`. The process entails a server operating in a standard Near-Video-on-demand (NVOD) mode, whereby it repeatedly transmits multiple copies of each program on separate channels. Each copy is delayed by a staggered time interval. The server also repeatedly transmits a beginning portion of each NVOD program of a duration up to the staggered time interval. The invention provides a way to fulfill a VOD user requests asynchronous with the start of a NVOD transmission but which still makes primary use of the NVOD transmission for that requestor. The invention further advantageously provides fixed asset utilization in a predictable manner.

Claims

1. A method of providing video-on-demand of the type wherein a video program is repeatedly transmitted at a staggered time interval from a video-on-demand-server to a viewbox wherein the viewbox receives a request for the video program, the method comprising the steps of:

repeatedly transmitting a beginning portion of the video program from the video-on-demand-server to the viewbox at a second staggered time interval;

and at a receiver end;

selecting a next commenced beginning portion of the video program for output by the viewbox, responsive to the request for the video program;

selecting and storing an in-progress one of a plurality of repeated transmissions of the video program in a buffer associated with the viewbox, responsive to the request for the video program; and

contiguously splicing an immediately previous transmission of the video program stored in the buffer, to a conclusion of the beginning portion of the video program, for output by the viewbox.

2. A method of providing video-on-demand as claimed in claim 1 wherein the beginning portion of the video program is of a duration equal to or greater than a delay of the request from a start of the in-progress transmission of the video program.

3. A method of providing video-on-demand as claimed in claim 1 wherein the beginning portion of the program is of a duration less than or equal to the staggered time interval.

4. A method of providing video-on-demand as claimed in claim 1 wherein the in-progress transmission is an immediately previous transmission of the video program.

5. A method of providing video-on-demand as claimed in claim 1 wherein storing the in-progress transmission in the buffer is done in a recirculating manner;

and wherein the splicing step further comprises reading the in-progress transmission from the buffer in a recirculating manner.

6. A method of providing video-on-demand as claimed in claim 1 wherein the beginning portion of the video program further comprises a lead-in.

7. A method of providing video-on-demand as claimed in claim 1 wherein the video program repeatedly transmitted at a staggered time interval further comprises a lead-in.

8. A method of providing video-on-demand as claimed in claim 1 wherein the storing step commences at a point advanced from the start of the in-progress transmission of the video program by an amount equal to the duration of the beginning portion of the video program.

9. A method of providing video-on-demand as claimed in claim 1 further comprising the step of displaying the video program associated with the request on a display, responsive to the viewbox selecting the beginning portion of the video program for output.

10. A method of providing video-on-demand of the type wherein a video program is repeatedly transmitted at a staggered time interval and wherein a beginning portion of the video program is repeatedly transmitted at a second staggered time interval from a video-on-demand-server to a viewbox associated with a request for the video program, the method comprising the steps of:

at a receiver end;

selecting an in-progress one of the repeated transmissions of the video program and storing it in a buffer associated with the viewbox, responsive to the request for the video program;

selecting a next commenced beginning portion of the video program provided by the video-on-demand-server, for output by the viewbox; and

contiguously splicing the in-progress transmission stored in the buffer to a conclusion of the beginning portion of the video program, for output by the viewbox.

11. A method as claimed in claim 10 wherein the beginning portion of the video program is equal to or greater than a duration of a delay of the request from the in-progress transmission of the video program and less than or equal to the staggered time interval.

12. A method as claimed in claim 10 wherein storing the in-progress transmission of the video program in the buffer is done in a recirculating manner;

and wherein the splicing step further comprises reading the in-progress transmission of the video program stored in the buffer in a recirculating manner.

13. A method as claimed in claim 10 wherein the beginning portion of the video program associated with the request further comprises a lead-in.

14. A method as claimed in claim 10 wherein the video program repeatedly transmitted at a staggered time interval further comprises a lead-in.

15. A video-on-demand system of a type wherein a video program is repeatedly transmitted at a staggered time interval from a video-on-demand-server to a viewbox via a transmission line communicatively coupled therebetween wherein the viewbox Is responsive to the video-on-demand-server which receives a request for the video program, the system comprising:

at a head end;

the video-on-demand-server repeatedly transmitting a beginning portion of the video program from the video-on-demand-server to the viewbox;

and at a receiver end;

the viewbox having an input coupled to the transmission line and an output, the viewbox further including;

a tuning circuit having a first output, a second output, an input and a control point wherein the first output is switchably coupled to the output of the viewbox, the input being coupled to the input of the viewbox;

a remotely controlled switching device having a first output, a second output, and an input coupled to the input of the viewbox;

the second output of the remotely controlled switching device being coupled to the control point of the tuning circuit for switchably and adjustably selecting both a next commenced one of the beginning portions repeatedly transmitted from the video-on-demand-server and an in-progress one of the repeated transmissions of the video program associated with a request for the video program;

wherein the selected next commenced beginning portion of the video program is switchably coupled to the first output of the tuning circuit and the selected in-progress transmission of the video program is switchably coupled to the second output of the tuning circuit; and

a buffer for storing the selected in-progress transmission of the video program;

the buffer including a first input, a second input, and an output wherein the output of the buffer is switchably coupled to the output of the viewbox, the second input of the buffer is coupled to the second output of the tuning circuit, and the first input of the buffer is coupled to the first output of the switching device;

wherein the remotely controlled switching device is further adapted for contiguously splicing the in-progress transmission of the video program stored in the buffer to the conclusion of the beginning portion of the video program.

16. A video-on-demand system as claimed in claim 15 wherein the remotely controlled switching device comprises a microcontroller.

17. A video-on-demand system as claimed in claim 15 wherein the beginning portion of the video program is of a duration equal to or greater than the delay of the request from a start of an immediately previous transmission of the video program.

18. A video-on-demand system as claimed in claim 15 wherein the beginning portion of the video program is of a duration less than or equal to the staggered time interval.

19. A video-on-demand system as claimed in claim 15 wherein the selected in-progress transmission is the immediately previous transmission of the video program.

20. A video-on-demand system as claimed in claim 15 wherein the remotely controlled switching device is adapted for recirculatingly storing to and reading from the buffer.

21. A video-on-demand system as claimed in claim 15 wherein the beginning portion of the video program associated with the request further comprises a lead-in.

22. A video-on-demand system as claimed in claim 15 wherein the video program repeatedly made available at a staggered time interval further comprises a lead-in.

23. A video-on-demand system as claimed in claim 15 wherein the processor is further adapted for storing the in-progress transmission of the video program in the buffer at a point advanced by an amount equal to the duration of the beginning portion of the video program.

24. A video-on-demand system of the type wherein a video program is repeatedly transmitted at a staggered time interval from a video-on-demand-server to a vlewbox via a transmission line communicatively coupled therebetween, the system comprising:

at a head end;

means for repeatedly transmitting a beginning portion of the video program at a second staggered time interval;

and at a receiver end;

means for selecting an in-progress one of the repeated transmissions of the video program and storing it in a buffer associated with the viewbox, responsive to a request for the video program;

means for selecting one of the repeatedly transmitted beginning portions of the video program, responsive to a request for the video program;

means for selecting one of the repeatedly transmitted beginning portions of the video program for output by the viewbox, responsive to the request for the video program; and

means for contiguously splicing the in-progress transmission of the video program stored in the buffer to a conclusion of the beginning portion of the video program, for output by the viewbox.

25. A viewbox apparatus for use with a video-on-demand system of the type wherein a video program is repeatedly transmitted at a staggered time interval from a video-on-demand-server, comprising:

means for selecting an in-progress one of the repeated transmissions of the video program and storing it in a buffer, responsive to a request for the video program;

means for receiving from the video-on-demand-server a beginning portion of the video program repeatedly transmitted by the video-on-demand-server at a second staggered time interval, for output by the viewbox responsive to a request for the video program; and

means for contiguously splicing the in-progress transmission of the video program stored in the buffer to a conclusion of the beginning portion of the video program stored in the buffer, for output by the viewbox.

26. A viewbox apparatus having an output and an input, the input being coupled to one end of a transmission line for receiving a video program in a video-on-demand system of a type wherein a video-on-demand-server coupled to an opposite end of the transmission line repeatedly transmits both a video program at a staggered time interval as well as a beginning portion of the video program at a second staggered time interval, the viewbox comprising:

a tuning circuit having a first output, a second output, an input and a control point wherein the first output is switchably coupled to the output of the viewbox, the input being coupled to the input of the viewbox;

a remotely controlled switching device having a first output, a second output, and an input coupled to the input of the viewbox;

the second output of the remotely controlled switching device being coupled to the control point of the tuning circuit for switchably and adjustably selecting both a next commenced one of the beginning portions of the video program and an in-progress one of the repeated transmissions of the video program associated with a request for the video program;

wherein the selected next commenced beginning portion of the video program is switchably coupled to the first output of the tuning circuit and the selected in-progress transmission of the video program is switchably coupled to the second output of the tuning circuit; and

a buffer for storing the selected in-progress transmission of the video program;

the buffer including a first input, a second input, and an output wherein the output of the buffer is switchably coupled to the output of the viewbox, the second input of the buffer is coupled to the second output of the tuning circuit, and the first input of the buffer is coupled to the first output of the switching device;

wherein the remotely controlled switching device is further adapted for contiguously splicing the selected in-progress transmission of the video program stored in the buffer to a conclusion of the beginning portion of the video program.

27. A viewbox as claimed in claim 26 wherein the remotely controlled switching device comprises a microcontroller.

28. A viewbox as claimed in claim 26 wherein the beginning portion of the video program is equal to or greater than a duration of the delay of the request from a start of the in-progress transmission of the video program and less than or equal to the staggered time interval.

29. A viewbox as claimed in claim 26 wherein the remotely controlled switching device is adapted for recirculatingly storing to and reading from the buffer.

30. A viewbox as claimed in claim 26 wherein the viewbox comprises a display for viewing the video program.

31. A viewbox as claimed in claim 26 wherein the beginning portion of the video program further comprises a lead-in.

32. A viewbox as claimed in claim 26 wherein the video program repeatedly transmitted at a staggered time interval further comprises a lead-in.