Browse Prior Art Database

Use of Closed Captioning for Indexing and Retrieval of Video

IP.com Disclosure Number: IPCOM000123330D
Original Publication Date: 1998-Sep-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 1 page(s) / 59K

Publishing Venue

IBM

Related People

Aras, CM: AUTHOR [+3]

Abstract

This invention uses standard closed captioning information available within live and recorded analog video content to address the need to search video content when the content is in digital form and stored on a random-access device.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 54% of the total text.

Use of Closed Captioning for Indexing and Retrieval of Video

   This invention uses standard closed captioning
information available within live and recorded analog video content
to address the need to search video content when the content is in
digital form and stored on a random-access device.

   Closed captioning information provided with nearly all
audiovisual materials may be used to index and search such
materials.  Closed captioning includes the basic textual information
included in NTSC, PAL, and SECAM formats as well as "Extended Data
Services".  In addition to standard analog formats, this technique is
applicable to digitally recorded formats such as MPEG-1, MPEG-2, and
DVD.  The Closed Caption extractor analyzes the video source,
generating two files, the Closed Caption Text and Index file and the
Video Content Index File.

   The Closed Caption Text and Index file contains text
strings extracted from the video and indices into the Video Content
Index File.  It may be prepared using standard database techniques to
optimize storage or retrieval.  Extraction of closed captioning from
conventional analog sources is readily performed using (for example)
standard ICs available for the purpose.  Digitally-recorded and
compressed analog video retains this closed captioning.  The
information is extracted before compression, encapsulated in standard
format, and re-inserted into the digital compressed data; thus it is
available for algorithmic extraction.  Stan...