Color video tape recorder/reproducer with chrome corrector

Claim 1

An EIAJ-2 video tape recorder and reproducer machine for recording a signal representing a video signal which includes luminescence and chrominance information onto a cassette-type video tape and for reproducing the video signal recorded on a cassette-type video tape, said machine comprising: a rotatable drum; means for rotating said drum; a first record/playback head carried by said drum at a first position along its circumference; a second record/playback head carried by said drum at a second position along said circumference which is diametricallyopposite said first position; means for transporting a portion of the video tape past said drum, said tape being wrapped about said circumference of said drum so as to define a helical path about at least a 180 degree arc such that as said drum rotates, said first and said second heads define a series of tracks on the tape which are aligned at an acute angle with respect to the length of said tape, said transporting means including capstan means for driving said video tape; means for rotating said capstan; modulator means for frequency modulating a carrier signal during the record operation with the video signal including the luminescence and the chrominance information to develop a modulated signal, said modulated signal being coupled to said first and second heads, whereby said modulated signal is recorded onto said series of tracks; record control means including means for controlling the rotational speed of said drum at a rate commensurate with an increased standard frame rate of said video signal such that an integer number of said tracks greater than one are used to record each field of said video signal, means for recording a control signal having a frequency commensurate with the color frame rate onto said video tape, and capstan controller means for controlling the rotational speed of said capstan during recording at a rate commensurate with said color frame rate; playback control means including means for reproducing said recorded color frame rate control signal, capstan controller means for controlling the rotation speed of the capstan during playback at a rate commensurate with said color frame rate, drum control means for controlling the rotatinal speed of said drum during playback at a rate equal with the speed of said drum during recording, whereby said first and second heads access said series of recorded tracks of the video signal; video signal reproducer means coupled to said first record/playback head and to said second record/playback head to receive video signals reproduced by said heads from tracks on the tape, said video signal reproducer means including video signal splicing means for splicing the portions of the modulated signal developed by said first and second heads to develop a spliced reproduced video signal demodulator means for receiving and decoding said spliced reproduced modulator signal to develop a demodulated reproduced video signal, output terminal means for receiving said reproduced video signal; and chroma corrector means responsive to the rotational speed of the drum and operative to develop a first correction signal when said first record/playback head is accessing the extremities of a respective track and a second correction signal when said second record/playback head is accessing the extremities of a respective track, wherein said video signal reproducer means is responsive to said first correction signal and operative to develop said reproduced modulated signal so as to correct for a decrease in pressure between said first head and the tape at the extremities of the respective track, and responsive to said second correction signal and operative to develop said reproduced modulated signal so as to correct for a decrease in pressure between said second head and the tape at the extremities of the respective track.