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HAD™ (Hole Accumulated Diode)

A CCD sensor developed by Sony with improved performance in spectral response, vertical smear, and sensitivity. The HAD sensor also introduced electronic shuttering capability to IT type sensors.

Halation

Unwanted exposure surrounding a photographic image caused by light scattered within the emulsion or reflected from the base. This scattered light causes a halo effect which is especially noticeable around sharply defined highlight areas.

Harmonic

The harmonic of a signal is a multiple of it. (IE: one harmonic of 200 Hz. would be 400 Hz.) All signals contain energy at multiples of the original. The primary frequency signal component is called the fundamental frequency

Harmonic Distortion

Harmonic distortion is present in a system if harmonics (multiples of a fundamental frequency) are detected at the system output when a single sine wave at the fundamental frequency drives the system input.

Hard

1. Having a high contrast. 2. Unforgiving. 3. The opposite of “soft”

HDCam

Sony cassette tape format for 8 bit component high definition digital video. It down samples to 3:1:1 and compresses the result 7:1

HDTV (High Definition Television)

High definition television. Typically 1,125-, 1,080- and 1,035-line interlace and 1,080-line progressive formats in a 16:9 aspect ratio. Officially a format is high definition if it has at least twice the horizontal and vertical resolution of the standard signal being used. There is a debate as to whether 720-line progressive is also high definition. It is the opinion of the editor that 720-line progressive is an HDTV format.

Head-End

In general broadcasting (Cable) terms a place where cable signals are received terrestrially, via satellite, via microwave or via fiber optic-cable and processed for distribution on the system or to other head-ends. In the TCS: a group of services in Config based on bandwidth.

Headstack

A multi-track tape head.

Heartbeats

A message sent from any external system (Alamar, EPG) at a set interval, advising the TCS System Monitor that it still has an active convection

Helical Recording

The process of moving a magnetic tape around a counter-rotating head drum or scanner to effectively create high writing speeds, recording the signal at an angle on the tape.

Hertz (Hz)

Electronic measures of cycles per second: the number of times an electrical event is repeated in a second.

Hetrodyne Recording

The process of reducing the size of the signal’s color information to limit the bandwidth requirements. (See color-under).

Hi-8

A videotape format that uses an 8-mm wide tape for hi-quality reproduction using Y/C component video recording. . It provides better image quality than VHS.

Hi-Band

The latest standard recording format for Mavica® still video that captures resolutions of up to 500 horizontal TV lines. Using new recording heads and process circuitry, the Hi-band format has improved recording resolution from 360 lines in the original “standard” format.

High Definition Television (HDTV)

High Definition Television has a resolution of approximately twice that of conventional television in both the horizontal (H) and vertical (V) dimensions and a picture aspect ratio (HxV) of 16:9. ITU-R Recommendation 1125 further defines “HDTV quality” as the delivery of a television picture, which is subjectively identical with the interlaced HDTV studio standard.

High Level

A range of allowed picture parameters defined by the MPED-2 video coding specification which corresponds to high definition television.

HIPPI

High performance parallel interface. A parallel data channel used in mainframe computers that supports data transfer rates of 100 Mbps.
Icon: In desktop computing and editing, a graphic symbol that represents a file, a tool, or a function.

HMI

Helium Mercury Iodide. An light of greater efficiency and color temperature than conventional tungsten. Often used for filming. Film must be shot at compatible speeds to avoid HMI Flicker

Hold-off

A master control switcher function that causes a scheduled event not to start playing until the HOLD OFF button is released or toggled.

Horizontal Blanking and Timing

The act of cutting off the electron beam at the end of each scanned line for the retrace interval.

The blanking signal found at the end of each video scan line extending from the start of the front porch to the end of the back porch.

Horizontal Blanking Interval

Part of the video signal that contains the pulses that control the transition from the end of one horizontal scan line to the beginning of the next.

Horizontal Phase

This is an alignment procedure to ensure that all video is timed correctly into a switcher.

Horizontal Resolution

In a television scanning system, the specification of resolution in the horizontal direction, meaning the ability of the system to reproduce closely spaced alternating black-and-white vertical lines of detail across the screen. The number of alternating black -and-white lines is divided by the aspect ratio (usually 3/4) to make comparison between horizontal and vertical resolution easier. This number is usually expressed as TV lines per picture height.

Horizontal Scan Rate

The speed at which the electron beam scans across the screen of a CRT. Horizontal scan rate is measured in kilohertz and is typically between 15 kHz and 40 kHz.

Horizontal Sync and Timing

The signal used by cameras and monitors to determine the start of each video line. It is a -40 IRE pulse occurring at the beginning of each video line and it triggers a return of the electron beam back to the left side of the display to begin the trace of a new horizontal video line.

Host

A computer that is setup to allow connections from other machines (known as clients).

Host Address

The Internet IP Address or hostname of a remote server. HTML Hypertext Markup Language. The language used to create and design Web sites. HTML is a standard text file with specific tags that a browser reads and interprets into a Web page.

House Master

A QA’d, transmission-quality version of the External Master with logical cuts in place and possible audio tracks required for the channel on which it will air. Is often called a House Master Dub.

HPA (High Power Amplifier

Used for satellite uplink.

HTTP

Hypertext Transfer Protocol. A protocol that your Web browser uses to connect to and receive data from Web servers.

Hue

The property that distinguishes colors from one another. Red, green, and blue are hues but white, gray and black are not considered hues. Subcarrier phase differences from 0 to 360 degrees (compared to the color burst) are used to determine the hue of a picture element in NTSC.

Huffman Coding

A type of source coding that uses codes of different lengths to represent symbols that have unequal likelihood of occurrence.

Hum

Unwanted interference at mains supply frequency or a harmonic thereof.

Hygroscopic

The property of magnetic tape that prevents water absorption.

Hyper HAD™

A derivative of the HAD sensor that incorporates On Chip Lensing (OCL)—the use of microscopic lenses mounted over each sensing pixel. Hyper HAD sensors with OCL have no perceptible smear and nearly doubled sensitivity.

Hypertext

A system of writing and displaying text that enables the text to be linked in multiple ways, to be available at several levels of detail, and to contain links to related documents.

Hyperlink

The text you find on a Web site which can be "clicked on" with a mouse, which in turn will take you to another Web page or a different area of the same Web page.