Accession Number:

ADA230322

Title:

Standardization of Freeze Frame TV Codecs

Descriptive Note:

Final rept.

Corporate Author:

DELTA INFORMATION SYSTEMS INC HORSHAM PA

Personal Author(s):

Report Date:

1990-06-01

Pagination or Media Count:

93.0

Abstract:

The purpose of this report is to recommend a protocol and a compression technique to be considered as the standard for freeze frame teleconferencing equipments. The recommendations in Section 4 is based on a an analysis of freeze frame teleconferencing equipments presently in use, b consideration of previous and presently on-going standardization efforts in related areas by respected technical organizations, and c the unique requirements teleconferencing places on freeze frame technology ie, compression, transmission, resolution, gray scale, storage, and display. Freeze frame technology as used in this report is a technique by means of which images normally requiring a wide band communication circuit for transmission can be transmitted over narrow band circuits. This is accomplished by selecting individual frames or fields from a television signal train for transmission. The concept of motion is, of course, lost, but the information content of a frame is conveyed in its entirety up to the specifications of the codec. The trade-off is channel bandwidth versus transmission time. RH

Descriptors:

• *COMPRESSION
• ORGANIZATIONS
• TIME
• TRANSMITTANCE
• BROADBAND
• STANDARDIZATION
• COMMUNICATION AND RADIO SYSTEMS
• TELECOMMUNICATIONS
• FRAMES
• CIRCUITS
• STORAGE
• BANDWIDTH
• CHANNELS
• NARROWBAND
• GRAY SCALE
• CONFERENCING(COMMUNICATIONS)
• VIDEO FRAMES
• REQUIREMENTS

Subject Categories:

• Command, Control and Communications Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE