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  2. 3GP and 3G2 - Wikipedia

    en.wikipedia.org/wiki/3GP_and_3G2

    3GP is defined in the ETSI 3GPP technical specification. [1] 3GP is a required file format for video and associated speech/audio media types and timed text in ETSI 3GPP technical specifications for IP Multimedia Subsystem (IMS), Multimedia Messaging Service (MMS), Multimedia Broadcast/Multicast Service (MBMS) and Transparent end-to-end Packet-switched Streaming Service ().

  3. CSS box model - Wikipedia

    en.wikipedia.org/wiki/CSS_box_model

    The Cascading Style Sheets (CSS) specification describes how elements of web pages are displayed by graphical browsers. Section 4 of the CSS1 specification defines a "formatting model" that gives block-level elements—such as p and blockquote—a width and height, and three levels of boxes surrounding it: padding, borders, and margins. [4]

  4. Comparison of video container formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_video...

    Some containers only support a restricted set of video formats: DMF only supports MPEG-4 Visual ASP with DivX profiles.; EVO only supports MPEG-4 AVC, MPEG-1 Video, MPEG-2 Video and VC-1.

  5. VHS - Wikipedia

    en.wikipedia.org/wiki/VHS

    Both VHS Hi-Fi and Betamax Hi-Fi delivered flat full-range frequency response (20 Hz to 20 kHz), excellent 70 dB signal-to-noise ratio (in consumer space, second only to the compact disc), dynamic range of 90 dB, and professional audio-grade channel separation (more than 70 dB). VHS Hi-Fi audio is achieved by using audio frequency modulation ...

  6. Aspect ratio (image) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(image)

    Cinerama at full height (three specially captured 35 mm images projected side by side into one composite widescreen image). 2. 6:1 = 8:3 = 24:9 Full-frame output from Super 16 mm negative when an anamorphic lens system has been used. Effectively, an image that is of the ratio 24:9 is squashed onto the native 15:9 aspect ratio of a Super 16 mm ...

  7. Television lines - Wikipedia

    en.wikipedia.org/wiki/Television_lines

    TVL is defined as the maximum number of alternating light and dark vertical lines that can be resolved per picture height. EIA 1956 video resolution target, used to measure TVL Television lines ( TVL ) is a specification of an analog camera or monitor's horizontal image resolution . [ 1 ]

  8. VHS-C - Wikipedia

    en.wikipedia.org/wiki/VHS-C

    The adapter contains a standard full-size engagement hub for the VCR's takeup sprocket, which connected to a gear train to drive the VHS-C cassette takeup gear. VHS end of tape is normally detected by a light in the VCR that inserts into the full-size cassette body, and detected by sensors in the VCR located at the far outer corners of the ...

  9. D-VHS - Wikipedia

    en.wikipedia.org/wiki/D-VHS

    As a final effort for VHS, the D-VHS system had significant advantages as a highly versatile domestic recorder (the other tape-based formats are DV and Digital8, which never gained any traction except as camcorder media), but given the wholesale move to DVD and then hard disk drive (HDD) recording, the format failed to make any headway into the video market.