Cinema Workshop

By Wilson, Anton | American Cinematographer, June 1979 | Go to article overview

Cinema Workshop


Wilson, Anton, American Cinematographer


THE VIDEO SIGNAL

Motion picture film captures the entire image in one fell swoop. The lens forms the image, the shutter opens, and the image is captured in the film emulsion. So what's new? The point is that all elements of the image are captured by the film emulsion simultaneously and in the same instant. This is not the case with the video process. This difference in image forming technique is the very essence of the principle of television.

Any picture or image is really made up of many "bits of information." In film these building blocks are grains of silver and a newspaper or magazine picture is made up of dots of ink. If a picture is comprised of too few "bits of information", the image will appear coarse and grainy with a lack of fine detail. Ideally, the image should be comprised of "bits" significantly smaller than the finest detail of the picture. The television picture can also be considered to be made up of bits of information, as many as 250,000 in a high-quality image. For simplification, these bits may be thought of as dots that can be black, white, or any shade of gray between, similar to grains of silver on photographic film. (For the time being, only a B & W picture will be considered.)

The lens on the television camera forms the image on the target of the tube in the same manner as a motion picture camera lens forms the image on the film. While the entire image is present on the target of the tube during the "exposure" of one "frame", the image is captured one bit at a time sequentially.

A beam scans the target image looking at each dot of information. Starting at the upper left hand corner, the beam scans horizontally to the right. …

The rest of this article is only available to active members of Questia

Already a member? Log in now.

Notes for this article

Add a new note
If you are trying to select text to create highlights or citations, remember that you must now click or tap on the first word, and then click or tap on the last word.
One moment ...
Default project is now your active project.
Project items
Notes
Cite this article

Cited article

Style
Citations are available only to our active members.
Buy instant access to cite pages or passages in MLA 8, MLA 7, APA and Chicago citation styles.

(Einhorn, 1992, p. 25)

(Einhorn 25)

(Einhorn 25)

1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

Note: primary sources have slightly different requirements for citation. Please see these guidelines for more information.

Cited article

Cinema Workshop
Settings

Settings

Typeface
Text size Smaller Larger Reset View mode
Search within

Search within this article

Look up

Look up a word

  • Dictionary
  • Thesaurus
Please submit a word or phrase above.
Print this page

Print this page

Why can't I print more than one page at a time?

Help
Full screen
Items saved from this article
  • Highlights & Notes
  • Citations
Some of your highlights are legacy items.

Highlights saved before July 30, 2012 will not be displayed on their respective source pages.

You can easily re-create the highlights by opening the book page or article, selecting the text, and clicking “Highlight.”

matching results for page

    Questia reader help

    How to highlight and cite specific passages

    1. Click or tap the first word you want to select.
    2. Click or tap the last word you want to select, and you’ll see everything in between get selected.
    3. You’ll then get a menu of options like creating a highlight or a citation from that passage of text.

    OK, got it!

    Cited passage

    Style
    Citations are available only to our active members.
    Buy instant access to cite pages or passages in MLA 8, MLA 7, APA and Chicago citation styles.

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn, 1992, p. 25).

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences."1

    1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

    Cited passage

    Thanks for trying Questia!

    Please continue trying out our research tools, but please note, full functionality is available only to our active members.

    Your work will be lost once you leave this Web page.

    Buy instant access to save your work.

    Already a member? Log in now.

    Search by... Author
    Show... All Results Primary Sources Peer-reviewed

    Oops!

    An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.