Abstract: A three dimensional projection television system in which the screen of the receiver alternatively receives a television picture field as polarized by polarizing apparatus and a television picture field which is orthogonally polarized with respect to the fields polarized by the polarizing apparatus. Also disclosed in a receiver for use in such a system. The receiver includes three projectors each projecting through a polarizer and an individual electro-optical crystal device.

Abstract: Television transmission or data storage system with time-division multiplex encoding. At least two signal sources are coupled via an encoding circuit for time-division multiplex encoding to a transmission or storage channel to which a data receiver including a decoding circuit can be connected. The signal supplied comprises two or more sub-picture signals during the line periods and the signal-compression or expansion time ratios for the different sub-picture signals are different. The decoding circuit is suitable for consecutively supplying signals during a line period of the data receiver, which signals largely correspond to the different sub-picture signals.

Abstract: Color-television transmission (or data storage) system having time-division multiplex encoding. A data source is coupled, via an encoding circuit for time-division multiplex coding and signal compression, to a transmission (or storage) channel to which a data receiver comprising a decoding circuit is connectable. Luminance information associated therewith is transmitted non-compressed in a number of p different line periods. The system is compatible with an existing color television standard because the chrominance information, supplied during the q line periods, is also added to the luminance information during the p line periods in accordance with the standard.

Abstract: Color television transmission and data storage system, respectively, with time-division multiplex encoding. A signal source is coupled via an encoding circuit for time-division multiplex encoding and signal compression to a transmission and storage channel, respectively to which a data receiver having a complementary decoding circuit is connectable. Luminance information associated with a number of p line periods is transmitted substantially non-compressed. A portion of the chrominance information associated therewith is transmitted in considerably compressed form in a number of q further line periods. In this situation there is an average chrominance time compression factor which is substantially equal to or less than q/p. On display, p lines are displayed with substantially the full bandwidth for the luminance and a limited chrominance bandwidth which is inherent to the time compression. The channel is then used optimally to obtain a high picture quality on display.

Abstract: A picture flicker correction is desired with video disc players involving display of a stop-motion or still television picture and with television displays using field and line frequency doubling, in accordance with the so-called ABAB method. With a movement detector (51) movement or the absence of movement is detected. Two adding circuits (19, 22) are connected in parallel to delay devices (9, 9+12) having time delays substantially equal to a field period. By means of two switch-over devices (32, 37) switched by the movement detector (51), the delay devices (9, 9+12) or the adding circuits (19, 22) can be coupled with a switch-over device (45) which is switched once per field period. A further delay device (42) having a time delay substantially equal to a field period provides for information transfer during second field periods of frame periods comprising two field periods.

Abstract: In a television transmission system, an encoding circuit in a data generator transmits (or stores) identification information relating to variable numbers of television lines or variable portions of television lines in which luminance and chrominance information occur, compressed where appropriate. The data receiver includes a simple, properly adaptable decoding circuit which comprises presettable counters for counting portions of television lines and for counting television lines, outputs of these counters being coupled to address inputs of a programmable memory which is coupled to a multiplexer which is switchable by the identification information and is followed by a logic circuit for generating control signals for a chrominance memory having the same write and read rates and for luminance and chrominance memories having said write rates and several read rates, under the control of a clock pulse source which is switchable via the logic circuit and the identification information.

Abstract: By providing, in a field-frequency doubling circuit comprising a converter circuit (3) of an A, A, B, B, type, an interpolation circuit (31) which combines, in an appropriate manner, the information of two subjacent lines of a first field of a picture of the television signal to be converted and a second field of a picture of the television signal to be converted, line flicker can be prevented from occurring without it being necessary to provide a movement detector and a change-over switch for an A, B, A, B-type conversion.

Abstract: A high definition color television transmission system in which wide-band luminance information (Y, FIG. 1) is utilized to produce a first luminance information portion comprising lower frequency (0 to 3.8 MHz) and middle frequency (3.8 to 5.5 MHz) components and a second luminance information portion comprising the middle frequency (3.8 to 5.5 MHz) and upper frequency (5.5 to 8.8 MHz) components. The first luminance information portion (Y1, FIG. 2) is transmitted by way of a first transmission path together with a color subcarrier (f.sub.sc) modulated by color information. The bandwidth of the color information is such that the modulation component lie substantially within the bandwidth of the middle frequency components. The second luminance information portion is frequency shifted to lie within 0 and 5 MHz (Y2, FIG. 3) and is transmitted by way of a second transmission path. The two transmissions may also carry separate sound signals (f.sub.S1, FIG. 1, f.sub.S2, FIG. 3).

Abstract: A compatible television system for high-definition and for standardized low-definition television. In a transmitter (1) in the system, a high-definition video signal (VS1) is generated which is split into a contour signal (HVC2) which on display shows details in the horizontal and vertical directions, and a low-definition video signal (VS6). The low-definition video signal (VS6) is converted into a low-definition video signal (VS7) in conformity with the standard. The contour signal (HVC2) is also converted, but is transmitted periodically over several picture periods (HVC3). Both these converted signals are transmitted or stored, respectively, in two separate signal channels (3,4), each suitable for standard low-definition television. In a receiver (2) the standard video signal (VS7) can be utilized directly for low-definition display by a standard display device (8).

Abstract: In order to minimize the effects of magnetic fields in a color television camera, the color prism arrangement is constructed so that at least two camera tubes can be arranged parallel to each other.