Abstract: In a video signal coder blocks of pixels are generated, scanned in a pseudo-random order and transformed blocks of coefficients which are stored in a buffer. The resulting blocks of coefficients are quantized individually by the use of a quantization level and the coefficients of each block are individually quantized by the use of a quantization matrix. The quantization level is determined by the fullness of the buffer.

Abstract: An integrated circuit interface means for use in a television receiver comprises means including an interface terminal which gives an indication of whether the receiver is operating in a standard or nonstandard mode. Standard operating mode occurs during the reception of standard broadcast signals. Non-standard non-broadcast signals cause the receiver to operate in a non-standard mode. The interface means also comprises means coupled to the same interface terminal for providing a signal to the integrated circuit which manually selects the operating mode, thereby allowing the interface terminal to serve the dual function of indicating and selecting the receiver operating mode.

Abstract: A deflection yoke comprises a magnetically permeable core having two separable halves. A yoke interlock member is attached to each core half with its position accurately fixed with respect to the core a pair of vertical deflection coils are toroidally-wound about the core with their position fixed with respect to the interlock members. The interlock member incorporates a number of horizontal coil engaging surface to fix the position of a horizontal coil with respect to the interlock member. The interlock member also incorporates tabs which separate the horizontal coils by a known distance. A pair of saddle-type horizontal deflection coils are disposed within the interior region of the core engaging the coil engaging surfaces and separated by the coil separation tabs. The interlock member therefore allows the construction of a yoke which provides accurate positioning of the vertical and horizontal coils with respect to each other and with respect to the core.

Abstract: A deflection yoke adjustment apparatus for adjusting a yoke on a kinescope comprises independent coil holders for supporting the horizontal and vertical deflection coils of the yoke. Six elongated positioning rods are attached to particular locations on each coil holder. Actuators, for example stepping motors, move selected ones of the rods to cause translation of the coil holders along a vertical, horizontal or longitudinal axis, or rotation of the coil holder about any of the aforementioned axes. The vertical and horizontal coils may be moved independently to provide an optimum kinescope display. The apparatus also comprises coil alignment devices associated with each positioning rod to maintain coil orientation during movement and force limiting means to protect the kinescope against damage during coil movement.

Abstract: An apparatus for reducing the effect of co-channel interference on horizontal synchronization of a television receiver having a comb filter for separating luminance and chrominance signals from a composite video signal comprises a synchronizing pulse separator, coupled to the comb filter output, for driving horizontal synchronizing pulses from the comb filter luminance signal. The co-channel interference beat frequency signals are reduced in amplitude by the comb filter and hence do not disrupt the operation of the synchronizing pulse separator.

Abstract: A mounting apparatus for use with a television deflection yoke adapted for transverse adjustment on a kinescope comprises an insulator adapted to be fixedly mounted on the neck of the kinescope at the rear of the insulator. The insulator receives horizontal and vertical deflection coils, and a magnetically permeable core, to form a deflection yoke. A plurality of yoke position orientation and fixing means are mounted to the front of the insulator. The position orientation and fixing means each comprise a guide means incorporating a first engagement means. A member, incorporating second engagement means, is slidably disposed within the guide means. The first and second engagement means cooperate to allow the deflection yoke to be securely held in its adjusted position when the sliding member of each orientation and fixing means is in abutment with the kinescope.

Abstract: A synchronous switched vertical deflection circuit for use with a television receiver comprises first and second bidirectional switches coupled to conduct current in opposite directions. Horizontal rate energy is coupled into one end of the switches. Vertical deflection means are connected to the other end of the switches. Pulse-width modulated signals are applied to the control terminals of the switches to allow conduction of the horizontal rate energy in the vertical deflection means during selected portions of each vertical deflection interval.

Abstract: In a television receiver comprising a display system incorporating a kinescope having horizontal in-line electron beams and also incorporating a deflection yoke having toroidally-wound vertical deflection coils, where the kinescope utilizes a magnetically-permeable G3 focussing electrode in the electron guns to reduce deflection defocussing, an arrangement for correcting misconvergence of the electron beams caused by the magnetically-permeable G3 electrode comprises a pair of magnetically-permeable field formers disposed along and extending toward the rear of the yoke. The field formers are configured to collect a portion of the external fields generated by the vertical windings and direct those portions through the kinescope neck substantially at right angles to the electron beams in the vicinity of the exit end of the electron guns with a barrel-shaped transverse pattern.

Abstract: An IF bandpass shaping circuit for use with a television receiver having a tuner for providing intermediate frequency signals comprises a surface acoustic wave (SAW) filter coupled to the tuner. The SAW filter provides a predetermined bandpass response. A tuned circuit is coupled between the tuner and the output of the SAW filter. The tuned circuit is responsive to a frequency bandwidth which is narrow relative to the response of the SAW filter. The tuned circuit response is added to the output of the SAW filter to provide a modified SAW filter response.

Abstract: A self-converging deflection yoke for use with a color television kinescope provides both coma and side pincushion distortion correction through the use of double bias vertical deflection coils. The vertical coils are toroidally wound about a magnetically permeable core. A winding frame insert located within the interior of the core allows the coils to follow the desired double bias or diamond configuration. The core insert comprises a ring-shaped base adjacent to the core. Removable wire guide members are spaced away from the base to form channels between the guide members and the base. These channels receive the wires during windings and act to define the shape of the coils. After the coils are wound, the guide members are removed, allowing the yoke to be assembled.

Abstract: A convergence measuring apparatus for use with a color television kinescope and deflection yoke comprises means for activating two of the electron beams of the kinescope to generate a convergence test pattern on the kinescope display screen. The convergence test pattern is a set of alternating color patches. The degree of overlap and gap between patches is indicative of the degree of beam misconvergence. A monochrome television camera observes the test pattern and provides a signal to a signal processor which controls the electron beam activating means to move one color patch with respect to the other color to reduce the gap and overlap between patches. A measurement of the amount of patch movement necessary to minimize the overlap and gap between patches is an indication of electron beam misconvergence in the vicinity of the test pattern.

Abstract: Vertical translation of a self-converging deflection yoke relative to an in-line TV kinescope may be necessary to achieve satisfactory raster distortion. The vertical translation of the yoke may cause a residual convergence error. The residual convergence error may be eliminated by means of first and second permeable tabs mounted on the yoke and arranged for simultaneous vertical adjustment.