System for encoding and displaying captions for television programs

• US 5,508,754 A
• Filed: 10/07/1994
• Issued: 04/16/1996
• Est. Priority Date: 03/22/1994
• Status: Expired due to Fees

• Current Assignee: National Captioning Institute
• Original Assignee: National Captioning Institute
• Inventors: Orphan, David W.
• Primary Examiner(s): Metjahic, Safet
• Application Number:
  US08/319,791
• Time in Patent Office: 557 Days
• Field of Search: 348/722, 348/844, 348/460, 348/461, 348/478, 348/476, 348/473, 348/552, 348/1, 348/9, 348/8, 348/474, 348/468, 348/467, 348/465, 348/469, 348/605, 348/705, 348/4, 348/589, 348/600 , 348/510, 348/512
• US Class Current: 348/722
• CPC Class Codes: H04M 11/085 using a television receiver, e.g. viewdata system
• CPC Class Codes: H04N 5/278 Subtitling
• CPC Class Codes: H04N 7/0255 Display systems therefor
• CPC Class Codes: H04N 7/0885 for the transmission of subtitles

Abstract

A system for encoding, storing, and displaying captions includes a modem for transmitting a signal including one or more closed captions generated in real time, a videotape player for playing a videotape of a television program including both a video signal and a time code signal corresponding to a time position of the video tape, an encoder for receiving the video signal and a caption input and integrating the video signal and the caption input into one integrated signal for transmission, and a computer that receives captions from the modem and a time code output from the video tape player. The computer transmits the received captions to an encoder and simultaneously generates data records storing the received captions with a time code stamp corresponding to the time code signal input when the caption was received. When a playback of the captioned television program is desired, the computer retrieves the stored caption data record and synchronizes the time code stamp of each caption in the data record with the received time code output. Thus, the computer supplies the synchronized caption to the encoder for insertion into the video signal from the videotape player, whereby captions are provided for refeeds of television programs without requiring a second generation recording of the originally captioned feed.

Claims

1. A method of providing captions for a television signal, the captions comprising a plurality of words to be superpositioned over a video portion of the television signal, the method comprising the steps of:

transmitting a caption data signal over a telephone line to a computer;

monitoring time code signals from a video program provided by a video player, said caption data signal corresponding to said video program;

outputting said caption data signal from said computer when a match is detected between a time code signal of said caption data signal and a time code signal of said video program;

inserting said output caption data signal into the video signal of said video program; and

generating and transmitting to a remote terminal acknowledgement signals indicating operating status of said computer.

2. A method according to claim 1, further comprising the steps of:

broadcasting said video program from said videotape player; and

generating said caption data concurrently with the broadcast of said video program.

3. A method according to claim 1, further comprising the step of:

time stamping said caption data with a time code corresponding to a time position of said videotape once said caption data is received by said computer.

4. A method according to claim 3, further comprising the step of:

storing said time-stamped caption data to a file stored in said computer.

5. A method according to claim 4, further comprising the steps of:

retrieving said stored time-stamped caption data from the file during a subsequent broadcast of the video program;

synchronizing the retrieved time-stamped caption data with the time code signals from the video program being subsequently broadcast; and

providing said synchronized caption data to said encoder for inserting said synchronized caption data into said video signal of said video program.

6. A method according to claim 1, further comprising the step of:

transmitting the acknowledgement signals to the encoder to be inserted into said video signal of said video program.

7. An apparatus for providing captions for a television signal, the captions comprising a plurality of words to be superpositioned over a video portion of the television signal, the apparatus comprising:

a modem for transmitting caption data over a telephone line;

a videotape player for playing a videotape, the videotape player outputting a video program signal and a time code signal corresponding to a time position of the videotape;

a computer for receiving said caption data from said modem, monitoring said time code signal output from said videotape player, outputting said caption data when a match is detected between a time code signal of said caption data signal and said time code signal from said videotape player, and generating and transmitting to a remote terminal acknowledgement signals indicating operating status of the computer, and

an encoder for inserting said output caption data signal into said video program signal.

8. The apparatus according to claim 7, further comprising a remote terminal coupled to the modem from which control commands controlling operation of the computer may be provided.

9. The apparatus according to claim 7, wherein the computer further comprises means for transmitting the acknowledgement signals to the encoder to be inserted into said video program signal.

10. The apparatus according to claim 7, wherein the remote terminal comprises a display screen which allows an operator to monitor operation status of the computer and displays options available to the operator.

11. The apparatus according to claim 7, wherein said computer further comprises:

means for generating data records comprising the received caption data and a time stamp corresponding to the received time code signal from said videotape player;

means for storing said data records to a file; and

means for retrieving the data records from the file, matching the time stamp of each data records in the file with the received time code signal from the videotape player, and transmitting the caption data corresponding to the matched time code signal to said encoder.