Abstract: A method assesses the quality of a television image. In diversity reception installations including several receivers, it is necessary to establish a criterion for selecting the receiver with the best image quality. For this purpose, the five vertical connection impulses are first detected in the video signal. The detection of the five equalization impulses initiates only after the vertical connection impulses have been detected. Then, the detection of the horizontal synchronization impulses, interfering impulses and the echo impulses is carried out only after the equalization impulses have been detected. The number of horizontal synchronization impulses, interfering impulses, and echo impulses detected is used as criterion for selecting the best receiver. The invention is applicable to diversity reception installations including several television receivers, in particular, for mobile installations.

Abstract: A picture signal includes a luminance signal and a color signal. A first predetermined number of sample points of the luminance signal are located on every actual scanning line. A second predetermined number of sample points of the color signal are located on every actual scanning line. The second predetermined number is equal to the first predetermined number multiplied by “1/n”, where “n” denotes a predetermined integer equal to or greater than 2. Virtual scanning lines are set which correspond to respective pairs each having two successive actual scanning lines. Sample points of the color signal are moved from each pair of two successive actual scanning lines to a corresponding virtual scanning line while being rearranged thereon so that the picture signal is converted. The total number of sample points of the color signal per virtual scanning line is equal to the first predetermined number multiplied by “2/n”.

Abstract: A caption data processing circuit in a decoder is provided for decoding a transport stream (TS). The caption data processing circuit extracts presentation information and caption data from an input transport stream and generates a control signal when the caption data of a one-picture unit has been extracted. A caption decoding portion of the circuit decodes the extracted caption data in response to the control signal. A buffer in the circuit stores the decoded caption data so that the presentation timing of the decoded caption data may be controlled based on the presentation information. As a result, the presentation timing of the picture data and caption data are exactly synchronized, thereby displaying the picture along with its correct caption.

Abstract: A display apparatus for a television or computer terminal having a cathode ray tube with a deflection coil. The display apparatus includes a signal processing circuit which compresses a display period in a horizontal scanning period of an input video signal and which expands a blanking interval of the horizontal scanning period of the video signal, the signal processing circuit providing an output of the video signal to the cathode ray tube, and a horizontal retrace interval expansion circuit which expands a horizontal retrace line interval of a horizontal deflection current for the deflection coil of the cathode ray tube in accordance with the blanking period expanded by the signal processing circuit. The cathode ray tube displays the input video signal in accordance with the output of the signal processing circuit and the output of the horizontal retrace interval expansion circuit.

Abstract: A system processes an image containing a first line and a second line, where the first and second lines includes a plurality of pixels, to generate an interpolated line. The system selects a first and second set of pixels from the lines and generates a first set and second set of filtered values. The system identifies in the first line an edge location in the first set of the filtered values by a first filtered value of the first set of filtered values being at least one of less than and equal to a first predetermined value and a second filtered value of the fist set of the filtered values being at least one of greater than and equal to the first predetermined value.

Abstract: A method and apparatus for changing the number of scan lines in a frame of video data to produce an image represented by the video data that corresponds to a desired aspect ratio. The apparatus includes a pair of finite impulse response filters for processing the decoded chrominance and luminance pixel values stored in memory. The filters permit a plurality of scan lines of chrominance and luminance data to be read and filtered on a continuous basis with any scan line of data being read only once. Thus, the filters provide a very efficient method of providing a frame of a number of output scan lines of chrominance and luminance pixel values that are different from the number of scan lines of chrominance and luminance pixel values in a frame of video data stored in memory.

Abstract: A level is preset into a counter. The level held in the counter is compared with the minimum value of the present video signal by a level detecting circuit. When the minimum value of the present video signal is lower than the level of the counter, the intermediate value between the value of the counter so far and the minimum value of the present video signal is obtained by an intermediate value calculating circuit, thereby presetting the counter and updating the level. Thus, the value of the counter gradually approaches a sync chip level. The video signal is sliced by a slice level formed on the basis of the value of the counter by a slice circuit, thereby extracting the sync signal. Further, in a mask signal generating circuit, the updating of the level is inhibited for a predetermined time after the updating of the level was performed for a predetermined period of time, thereby preventing the level from being influenced by the noise for the video period.

Abstract: An apparatus for transmitting video data over an integrated services digital network. The apparatus comprises a video/audio receiving unit, a transmitting unit for transmitting video data over a switched connection to the video/audio receiving unit, a receiving unit for receiving request signals from the video/audio receiving unit, an encoding unit for encoding the video data using at least two different encoding methods, and a control unit cooperatively engaged with the encoding unit, wherein the encoding methods are selectable in accordance with the request made by a subscriber to select the type of encoding method and the time of encoding.

Abstract: A method for identifying a fast speed mobile station (MS) in a radio system, said method comprising measuring the frequency error of radio signals received from a mobile station. In order for a fast speed mobile station to be more reliably identified than before, the method comprises calculating the change (df) in BSC the frequency error from a time interval (t) of predetermined length, and identifying the mobile station as a fast speed mobile station if the change (df) in the calculated frequency error exceeds a predetermined limit value.

Abstract: A closed-caption broadcasting and receiving method and apparatus. According to the closed-caption broadcasting method and apparatus, additional information is inputted and the input of word information is checked. If the word information is inputted, it is selected, while if not, the additional information is selected. Thereafter, character information and control information of the selected information are inputted. A control code of 2 words is obtained by combining the control information with a mode control bit and a parity bit, and the character code of 2 words including a syllable character completion type code is obtained by combining the character information with a mode control bit and a parity bit. A digital-modulated caption signal is produced by inputting the control code and the character code, and is coded in a scanning line which does not affect a television video signal to be transmitted.

Abstract: A video imaging apparatus includes a source of a blanking signal that is indicative when a blanking interval occurs in a video signal. A delay circuit including a horizontal line counter is responsive to the blanking signal and to a signal at the horizontal rate for delaying the blanking signal by a multiple number of horizontal periods to generate a delayed signal. A dynamic focus voltage generator includes a switch responsive to the delayed signal for applying a dynamic focus voltage to a focus electrode, when the switch is at a first state, and for disabling the application of the dynamic focus voltage, when the switch is at a second state. An end time of the interval, during which the dynamic focus voltage is disabled, is determined in accordance with an output signal of the counter.

Abstract: A method of selecting a set of color sources for an image display system, the image display system creating a color image from at least three single-color color sources. According to one embodiment of the present invention, the method comprises selecting a first, second, and third color source. The first and second color sources are divided into a high-efficiency group and a low-efficiency group based on the efficiency of the color source. If the first color source is selected from the high-efficiency group (1102), the second color source may be selected from either the high-efficiency group or the low-efficiency group (1104). If the first color source is selected from the low efficiency group (1102), the second color source is selected from the high-efficiency group (1106). According to one embodiment of the present invention, the third color source is selected (1108) without first sorting the third color sources into high and low-efficiency groups.

Abstract: The system of the invention passes wireless caller location information through the common channel signaling network (CCSN) to the PSAP such that the PSAP can provide enhanced emergency services. The caller location information such as the latitude and longitude of the wireless device or the cell and cell sector from which a call is made is encoded in the ISUP (ISDN User Part) of the call set up message over the CCSN. The public switched network routes the call based on the called party number (CDPN) parameter to the appropriate selective router and the selective router routes the call to the appropriate PSAP based on the caller location. The caller location information is transmitted over an ISDN interface to the PSAP. The PSAP can then access additional caller information based on the CDPN parameter to provide enhanced emergency services. Thus, the system of the invention allows enhanced 9-1-1 service to be provided in wireless systems while utilizing existing wireless infrastructure and protocols.

Abstract: The generation of progressive output video from interlaced source video is disclosed. In one aspect of the invention, a computerized system includes an interlaced source video and a progressive output video. The interlaced source video has a number of lines and includes a first field having odd lines and a second field haveing even lines. The progressive output video has a number of lines half that of the number of lines of the interlaced source video. Each line of the progressive output video heavily weight weights a corresponding line of each of the first field and the second field of the interlaced source video. Desirably, each line of the progressive output video also lightly weights an immediately successive and an immediately preceding line of each of the first field and the second field of the interlaced video source.

Abstract: An image data format conversion apparatus comprises: a memory storing image data; a data reading means reading image data from the memory to output it; a format converting means converting the image data output from the data reading means to a predetermined format to output it or making the image data pass through without converting it; a vertical filter vertically interpolating the image data output from the format converting means by filtering operation to output the data or making the image data pass through without interpolating it; a horizontal filter vertically interpolating the image data output from the vertical filter by filtering operation to output the data or making the image data pass through without interpolating it; an image synthesizing means performing logic operation for image data output from the filter, and synthesizing the image data to output it; and an image output means outputting the image data from the image synthesizing means to a designated display unit.

Abstract: The signal receiving device, during the fixed time period the fixed time before the telecast start time point of the recording reserved program, as well as causing the external recording device to output the video information of the program information image formed based on the program information data, causes said external recording device to conduct the recording operation. Then, in a state in which video information of the recording reserved program is sent out to the external recording device, it causes the external recording device to execute the recording operation during the period from the time point a few seconds before the telecast start time point to the telecast stop time point of the recording reserved program.

Abstract: Apparatus for encoding a continuous (i.e. QAM) signal into a (non-continuous) video signal is achieved in a manner to obviate noise problems normally introduced by breaks in the (video) signal due to horizontal and vertical pulses, low fidelity circuits, timing errors and time shifts. The apparatus employs a circular First-In-First-Out buffer with an address counter. The continuous signal is samples and coded on to a active portion of a video line and an address pointer in the address counter is adjusted back a given number of samples at the end of the video line. On the next video line, that (adjusted) number of samples (from the previous line) are output from the buffer before new data is output. By adjusting the number of samples and adding extra samples to the next video line, noise problems are virtually eliminated.

Abstract: To simplify the circuitry in a television signal receiver having a radio-frequency tuner (1) and at least two subsequent surface-acoustic wave filters (2, 3), in which the radio-frequency tuner (1) filters a radio frequency television signal applied to its input and converts it to an intermediate-frequency television signal which is coupled to the surface-acoustic wave filter (2, 3), the radio-frequency tuner (1) has at least two outputs (6, 7) which supply the IF television signal converted to the intermediate frequency. Each output (6, 7) is associated with a switch (8, 9) for switching the associated output (6, 7) to a fixed reference potencial. A first input (10; 12) of the two surface-acoustic wave filters (2, 3) is coupled to a first output (6) of the radio-frequency tuner (1), and a second input (11; 13) of the two surface-acoustic wave filters (2, 3) is coupled to a second output (7) of the radio-frequency tuner (1).

Abstract: Upon installation of a broadcast receiver, for example, a television receiver, the different tuning frequencies/channel numbers are to be stored in a memory of the broadcast receiver. To facilitate the installation, the network provider transmits a list of nominal tuning frequencies, for example, as a teletext page, together with at least one of the broadcast television programs. To further improve installation, also the RF frequency of a so-called subscription channel is also inserted in the list. As the RF frequency of the set-top box may differ from the nominal value in the list, a fine-tuning is performed to modify the stored tuning frequency/frequencies.

Abstract: In a white balance control, correction signals are added to input chrominance signals (Uin, Vin) to obtain output chrominance signals (Uout, Vout). Chrominance sum signals are derived from the input and output chrominance signals (Uin, Vin ; Uout, Vout) and reference chrominance signals (Uref, Vref). Exponential signals are derived from the chrominance sum signals, and the reference chrominance signals (Uref, Vref) are multiplied by the exponential signals to obtain the correction signals.