Rca Inc.

Rca Thomson Licensing Corp.

Eric Peter Herrmann

Sheau-Bao Ng

Apparatus in a receiver includes error detection circuitry for detecting segments of transmitted encoded image data having non correctable errors. Further apparatus generates error maps for respective frames in the transmitted sequence. Responsive to the data in the error maps, known good image data or interpolated image data is substituted for data corresponding to the segments containing errors. Error indications for anchor frames, from which predictive frames are encoded, are propagated into error maps corresponding to the predictive encoded frames to accommodate error concealment of errors that may propagate into successive dependently encoded frame data.

Error concealment apparatus for a compressed video signal processing

A plurality of floating regions of a charge transfer device, such as the floating gates of a charge-coupled device (CCD), connected to a corresponding number of output gates to form potential wells beneath these output gates whose depths are charge signal dependent. Control gates selectively couple each well to one of two output regions of opposite conductivity type than the substrate and the selected output regions and output gates are operated in one of a number of possible 'fill and spill' modes to produce output signals. One of the output regions at an output gate location, when selected, is employed to produce an output signal proportional to charge and the other, when selected, is employed to produce the complement of the output signal.

Charge transfer output circuits

An output electrode of a charge coupled device (CCD) register comprises a conductor which is insulated from the substrate over the major portion of its length and which is connected at one end to a diffusion in the substrate of opposite conductivity type than the substrate. A voltage source capacitively coupled to the output electrode supplies a voltage which varies between two levels. In response to one of these levels, the output electrode assumes a potential such that charge signal may accumulate in the region of the substrate beneath the output electrode and at which the semiconductor junction between the diffusion and the substrate is reversed biased. In response to the transition of the voltage from the one to its other level, the junction becomes forward biased and clamps the output electrode to the substrate potential.

Charge coupled device with diode reset for floating gate output

Circuit employing complementary field-effect transistors operated in the triode mode. A signal representing the multiplicand is applied to the gate electrode of one transistor and a signal representing the multiplier is applied to the drain electrode of the same transistor. The complement of the multiplier signal is applied to the drain electrode of the other transistor. A current indicative of the product is available at the common connection of the source electrodes.

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Bound Brook, NJ, United States of America

Eric Peter Herrmann