Abstract: An anthropomorphic shoulder mount for supporting a camera or similar device. Three modes of shoulder pad motion are provided to permit good conformance to the operator's shoulder contour regardless of anthropomorphic variations among various operators. An articulated saddle adjustably hinges forward and rearward from a fixed center section to conform to the operator's upper back and chest. The camera support adjustably rotates about a longitudinal axis to accommodate the slope of either of the operator's shoulders. Further, the camera support adjustably translates along the longitudinal axis to permit optimization of the center of gravity on the operator's shoulder.

Abstract: An equalizer in which an input signal is double differentiated without introducing phase shift. First and second differentiating circuits are provided at the input electrode and one of the output electrodes of a transistor. A further circuit is provided at the other transistor output electrode, the circuit having the same time constant as the time constant of the first differentiating circuit. Low pass filters and noise suppression may be included in embodiments particularly useful in video and audio recording and reproducing systems.

Abstract: Apparatus, including an injection lock and voltage controlled oscillator, generates a signal that follows the average frequency variations and instantaneous phase variations of a repetitive non-continuous signal. The oscillator injection lock input receives the repetitive signal and its DC control input receives an error signal generated in an AFC loop which derives the difference between the oscillator output and the repetitive signal average frequency. In one particular application, the appartus is useful in a color television signal processing or reproducing system for generating a television color subcarrier signal. The apparatus is further disclosed in connection with a demodulation-remodulation type color corrector in a video reproducing system.

Abstract: A helical wrap tape transport system having a plurality of components cooperating to provide a low friction and highly accurate transport of magnetic tape for video broadcasting. The transport system has a helical scanner assembly with a rotating scanning drum having helical surface V-grooves which create an air bearing for magnetic tape wrapped across the drum and oppositely mounted recording transducers which permit continuous recording on a 180.degree. tape wrap around the drum, and a stationary drum on a common axis with the rotating drum having a fixed control track transducer for synchronizing tape transport at the scanning assembly. The transport system has further, air bearing guide posts and a pair of vacuum columns which continuously monitor a tape supply loop which in combination with the guide posts provide a section of low inertia recording tape, the transport of which can be controlled by a single high friction drive capstan.

Abstract: Motor drive and servo systems particularly useful in high quality broadcast video tape recorders. A sine/cosine drive for a brushless DC motor permits high motor efficiency in a system adapted for use in a servo loop. A technique for phase locking a pair of frequency related phase locked control variable signals to a pair of frequency related reference signals, horizontal and vertical sync signals, for example, provides the advantages and precision of closed loop correction at widely variable correction rates. More accurate tape shuttling in a VTR is provided by running a DC motor in a phase locked loop as a synchronous motor and more accurate stopping of the tape is provided by comparing the capstan speed to ground in a closed loop. Improved tape tension control in the head area is provided by a pair of vacuum columns controlled by an error signal derived from the peak-to-peak tension error.

Abstract: A velocity error compensator for a multiple video head VTR in which velocity error compensation is provided for all the lines adjacent a head switch. Separate velocity error detectors are provided in auxiliary channels continuously connected to each respective video head. By providing a mechanical overlap of video heads on the tape velocity error signals are developed for all the lines adjacent a head switch. Depending on the type of velocity error detection employed, the mechanical overlap must be sufficient to provide either simultaneous horizontal sync pulses or both horizontal sync pulses and color bursts from the adjacent heads. Suitable switching is provided to continuously apply the correct velocity error signal to the main channel video signal which is to be corrected. The arrangement avoids banding that develops in multi-generation copies where a line adjacent a head switch is not velocity corrected.