Sony HDVS was a range of high-definition video

High-definition video

High-definition video or HD video refers to any video system of higher resolution than standard-definition video, and most commonly involves display resolutions of 1,280×720 pixels or 1,920×1,080 pixels...

 equipment developed in the 1980s to support an early analog high-definition television system thought to be the broadcast television systems that would be in use today. The line included professional video camera

Professional video camera

A professional video camera is a high-end device for creating electronic moving images...

s, video monitors and linear video editing

Linear video editing

Linear video editing is a video editing post-production process of selecting, arranging and modifying images and sound in a predetermined, ordered sequence. Regardless whether captured by a video camera, tapeless camcorder, recorded in a television studio on a video tape recorder the content must...

 systems

Sony first demonstrated a wideband analog video

Analog video

Analog video is a video signal transferred by an analog signal. An analog color video signal contains luminance, brightness and chrominance of an analog television image...

 HDTV capable video camera, monitor and video tape recorder

Video tape recorder

A video tape recorder is a tape recorder that can record video material, usually on a magnetic tape. VTRs originated as individual tape reels, serving as a replacement for motion picture film stock and making recording for television applications cheaper and quicker. An improved form included the...

 (VTR) in April of 1981 at an international meeting of television engineers in Algiers

Algiers

' is the capital and largest city of Algeria. According to the 1998 census, the population of the city proper was 1,519,570 and that of the urban agglomeration was 2,135,630. In 2009, the population was about 3,500,000...

. The HDVS range was launched in April 1984, with the HDC-100 camera, HDV-100 video recorder and HDS-100 video switcher all working in the 1125-line component video

Component video

Component video is a video signal that has been split into two or more component channels. In popular use, it refers to a type of component analog video information that is transmitted or stored as three separate signals...

 format with interlaced video and a 5:3 aspect ratio.

The helical scan

Helical scan

Helical scan is a method of recording high bandwidth signals onto magnetic tape. It is used in reel-to-reel video tape recorders, video cassette recorders, digital audio tape recorders, and some computer tape drives....

 VTR (the HDV-100) used magnetic tape

Magnetic tape

Magnetic tape is a medium for magnetic recording, made of a thin magnetizable coating on a long, narrow strip of plastic. It was developed in Germany, based on magnetic wire recording. Devices that record and play back audio and video using magnetic tape are tape recorders and video tape recorders...

 similar to 1" type C videotape for analog recording

Analog recording

Analog recording is a technique used for the recording of analog signals which among many possibilities include audio frequency, analog audio and analog video information for later playback.Analog recording methods store signals as a continual wave in or on the media...

. Sony eventually released a digital recording

Digital recording

In digital recording, digital audio and digital video is directly recorded to a storage device as a stream of discrete numbers, representing the changes in air pressure for audio and chroma and luminance values for video through time, thus making an abstract template for the original sound or...

 VTR (the HDD-1000) that used digital signal

Digital signal

A digital signal is a physical signal that is a representation of a sequence of discrete values , for example of an arbitrary bit stream, or of a digitized analog signal...

s between the machines for dubbing but the primary I/O remained analog signal

Analog signal

An analog or analogue signal is any continuous signal for which the time varying feature of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal. It differs from a digital signal in terms of small fluctuations in the signal which are...

s. There was also a portable videocassette recorder (the HDV-10) for the HDVS system, using the "UniHi" format of videocassette using 3/4" wide tape.

The first drama film

Drama film

A drama film is a film genre that depends mostly on in-depth development of realistic characters dealing with emotional themes. Dramatic themes such as alcoholism, drug addiction, infidelity, moral dilemmas, racial prejudice, religious intolerance, poverty, class divisions, violence against women...

 shot using the HDVS professional video camera is Julia and Julia

Julia and Julia

Julia and Julia is a 1987 Italian drama film directed by Peter Del Monte. The screenplay by Silvia Napolitano, Sandro Petraglia, Joseph Minion, and Del Monte is based on a story by Napolitano.-Plot synopsis:...

 (Italian: Giulia e Giulia) in 1987 http://www.imdb.com/title/tt0093092/, the first HDTV television show CBC

Canadian Broadcasting Corporation

The Canadian Broadcasting Corporation, commonly known as CBC and officially as CBC/Radio-Canada, is a Canadian crown corporation that serves as the national public radio and television broadcaster...

's Chasing Rainbows was shot using the HDVS system in 1988.