WO1995004431A2 - System and method for storing and forwarding audio and/or visual information on demand - Google Patents
System and method for storing and forwarding audio and/or visual information on demand Download PDFInfo
- Publication number
- WO1995004431A2 WO1995004431A2 PCT/US1994/007995 US9407995W WO9504431A2 WO 1995004431 A2 WO1995004431 A2 WO 1995004431A2 US 9407995 W US9407995 W US 9407995W WO 9504431 A2 WO9504431 A2 WO 9504431A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- data stream
- storing
- demand
- video signals
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
- H04N7/17318—Direct or substantially direct transmission and handling of requests
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
- H04N7/17336—Handling of requests in head-ends
Definitions
- 3-bit down counter 304 When shift register 302 is loaded from the signal out of counter 312, 3-bit down counter 304 is loaded with a 7 (largest 3-bit value) from 3-bit parallel latch 305. Counter 304 counts down 8 times (from 7 to 0) . Upon reaching 0, counter 304 sends a '1' to 8-bit wide FIFO memory 303 telling it to load the byte pattern from 8-bit shift register 306. The pattern being shifted out of shift register 310 is the beginning of a 132-byte record starting with the sync byte going to shift register 306. Shift register 306 contains 8- bits of the mask from shift register 302. Shift register 310's clock comes from AND gate 323.
- the communications board rejects a record due to checksum or misses a record count (they are sequential) , then the board fills in the missing data within the file on the SCSI disc.
- the number of bits per record to be written to disc is preferably divisible by 8. This prevents data gaps and out of sync records.
- the data queue controller gets an interrupt from the input circuit indicating a record has arrived, then it checks a bit provided by the input circuit that indicates whether the record passed the checksum validation. If the record did not pass the checksum validation, then the record is discarded. If the record passes the checksum, then the record number is compared to the expected record and if it is out of sync then all of the records between the expected record and the one that actually arrived are assumed to be lost. This allows for the loss of large amounts of data in consecutive order.
- the control program tells data queue controller 440 (via system bus 430) to reset the circuit board, and to send a file of N bytes to specific output channel.
- the data queue controller polls this channel, the data queue controller 440 determines whether 8-bit wide FIFO memory 418 is almost empty.
- Yet another application would include bringing audio/video source material back from a distant and probably international location without concern for transmission time, or if normal facilities are not available (e.g., such as telephones at a disaster area) .
- Using the system and method of the present invention one can store the material in real time and then transmit it, as well as recapture it, later to save even more on transmission costs and/or accommodate bandwidth availability.
- An example of cost reduction would include using the telephone lines when they were less busy (and expensive) , or a satellite when it had available (inexpensive) time to transmit the audio/video material- bearing signal.
- Another example would be to transmit the material at a slower (more inexpensive) data rate.
- a further application would include employing the present system and method for commercial insertion.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU73990/94A AU694950B2 (en) | 1993-07-23 | 1994-07-19 | System and method for storing and forwarding audio and/or visual information on demand |
CA002167801A CA2167801C (en) | 1993-07-23 | 1994-07-19 | System and method for storing and forwarding audio and/or visual information on demand |
EP94923948A EP0710420A1 (en) | 1993-07-23 | 1994-07-19 | System and method for storing and forwarding audio and/or visual information on demand |
JP50585595A JP3574931B2 (en) | 1993-07-23 | 1994-07-19 | System and method for storing and transferring audio and / or visual information on demand |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/096,098 | 1993-07-23 | ||
US08/096,098 US5440336A (en) | 1993-07-23 | 1993-07-23 | System and method for storing and forwarding audio and/or visual information on demand |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1995004431A2 true WO1995004431A2 (en) | 1995-02-09 |
WO1995004431A3 WO1995004431A3 (en) | 1995-03-30 |
Family
ID=22255299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/007995 WO1995004431A2 (en) | 1993-07-23 | 1994-07-19 | System and method for storing and forwarding audio and/or visual information on demand |
Country Status (6)
Country | Link |
---|---|
US (1) | US5440336A (en) |
EP (1) | EP0710420A1 (en) |
JP (2) | JP3574931B2 (en) |
AU (1) | AU694950B2 (en) |
CA (1) | CA2167801C (en) |
WO (1) | WO1995004431A2 (en) |
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Also Published As
Publication number | Publication date |
---|---|
JP2004260841A (en) | 2004-09-16 |
CA2167801A1 (en) | 1995-02-09 |
EP0710420A1 (en) | 1996-05-08 |
JPH09501031A (en) | 1997-01-28 |
CA2167801C (en) | 1999-08-31 |
WO1995004431A3 (en) | 1995-03-30 |
JP3858122B2 (en) | 2006-12-13 |
AU694950B2 (en) | 1998-08-06 |
JP3574931B2 (en) | 2004-10-06 |
US5440336A (en) | 1995-08-08 |
AU7399094A (en) | 1995-02-28 |
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