Abstract: A display method and apparatus are provided for enabling a user, whether or not he has experience, to readily detect a luminance level of a video image with high accuracy. A luminance level of a video signal of a video image is converted to color information to display a change in the luminance of the video image as a change in color. The conversion preferably involves a method of converting the luminance level to color information of three primary colors, red, green, blue, in accordance with a plurality of weights, respectively, a method of converting a luminance level in a predetermined range to color information having a changing rate larger than a changing rate of the luminance level, a method of converting a luminance level out of the predetermined range to color information of a maximum or a minimum level, or the like. Also, the input video signal is preferably displayed together with a converted video image side by side or one on another.

Abstract: A push-pull type self-oscillating power converter uses a main power transformer connected to a current transformer in series in such a way that a secondary current flowing through secondary sides of the two transformers is feedback to the primary side of the current drive transformer to generate a drive current for driving two switches. The drive current is proportional to the secondary current in the secondary side of the main power transformer.

Abstract: Disclosed is a method which comprises the steps of providing a video-signal output device (4), accepting a brightness component of a video signal corresponding to a first position of a subject (1) which is imaged by the video-signal output device (4), correcting a gamma (?) value of the brightness component corresponding to the first position, accepting a brightness component of the image signal corresponding to a second position of the subject (1) which is imaged by the video-signal output device (4), correcting the gamma (?) value of the brightness component corresponding to the second position, calculating a ratio between the gamma-corrected brightness component corresponding to the first position and the gamma-corrected brightness component corresponding to the second position, and displaying the ratio.

Abstract: A highly integrated data structure for synthesizing a waveform is provided for facilitating integrated handling of the data. The data structure for waveform synthesis data or use in generation of a target waveform comprises, at a macro level, a macro waveform value data field for storing a waveform value data section including source waveform value data for use in the generation of the target waveform, and a macro (first) header including control data for forming a macro waveform in the target waveform using the source waveform value data included in the data field. At a micro level, the data structure according to the present invention comprises a micro waveform value data field, and a micro (second) header for generating a micro waveform in the target waveform using the waveform value data included in the micro waveform value data field.

Abstract: A method of creating a DVB-H signal having a desired bit rate includes the steps of preparing a TS signal of DVB-H Standard in conformity to a first bit rate (71), storing a burst period (T) of the TS signal and a second bit rate higher than the first bit rate, determining the number (a) of NULL packets to be increased in the burst period (T) (73), storing the TS signal including the number (n) of packets in the burst period in units of packets (74), storing the number (a) of NULL packets next to the stored TS packets (76, 77), and repeating the step (74) and the step (76, 77) until the complete TS signal is stored (75). An apparatus comprises means for executing the steps.

Abstract: A genlock device comprises: means (31) for inputting an external reference signal; means (32,33,34,36,39,40,41,42,44) for generating a master reference clock signal synchronized in phase with the external reference signal; and means (37) for storing a genlock state. The genlock state includes, for example, absence of a synchronization signal in the external reference signal. The genlock device can further comprise: means (45) for storing a voltage value determined so that a voltage controlled oscillator (40) oscillates a signal having a frequency higher or lower by a predetermined value than a reference frequency of the voltage controlled oscillator; and means (44) for judging whether a voltage value which controls the voltage controlled oscillator is larger or smaller than the voltage value.

Abstract: An improved channel detecting apparatus is provided for detecting a channel. The channel detecting apparatus comprises a channel search circuit (3). When a certain frequency is detected through a search sweep using a frequency sweep signal for a channel, the channel search circuit determines whether or not the detected frequency falls within a frequency range associated with the channel. The channel search circuit (3) comprises a controller (32). The controller can comprise a sweep stop timing circuit (320) and a sweep resume timing circuit (322). The sweep stop timing circuit (320) stops the search sweep when the output of the channel is generated in response to the search sweep using a frequency sweep signal.

Abstract: An apparatus for modifying part of a predetermined packet comprises means (31) for receiving a TS and determining whether or not each TS packet is a predetermined packet, means (32) for delaying the TS, means (33) for modifying part of the predetermined packet, and means (34) for receiving a delayed TS and a modified predetermined packet and selectively outputting the delayed TS packet and the modified predetermined packet. The third means (33) overwrites an ID described in a predetermined or a similar item (for example, Number) on a predetermined ID or a similar item (for example, Number).

Abstract: An apparatus comprises input means, detection means and a selector, and automatically detects a kind of serial signal used in BER measurement. The input means receives at least two signals which include a data signal, and a clock signal having a period corresponding to one bit of the data signal. The detection means determines which one of the at least two signals is a clock signal or a data signal. The selector outputs the signal determined to be a clock signal from a clock signal terminal and outputs the signal determined to be a data signal from a data signal terminal.

Abstract: A measuring instrument is fed with a video output signal, and performs RGB processing on the video output signal to generate graphic data. A video signal level in the graphic data is measured and video signal level data is generated. Display data including the graphic data and the video signal level data is generated. A display device receives display data from the measuring instrument. The display data is visualized and an image and a video signal level are displayed.

Abstract: An apparatus comprises means (31) for receiving a broadcast TS (transport stream) and detecting layer information in each broadcast TS packet, means (32) for delaying the broadcast TS, means (37) for inputting an MPEG-TS for rewriting, means (33) for generating a signal for selecting a delayed broadcast TS packet when the layer information does not indicate a predetermined layer, and generating a signal for selecting an MPEG-TS packet for rewriting when the layer information indicates the predetermined layer, and means (38) for selectively outputting the delayed broadcast TS packet and the MPEG-TS packet for rewriting. The apparatus may further comprise means (34) for modifying a PAT packet of the broadcast TS, and means (35) for modifying an NIT packet of the broadcast TS, where the apparatus can selectively output the modified PAT packet and modified NIT packet.

Abstract: A bit rate converting apparatus suitable for a DVB-H signal which does not have a function of rewriting a PCR value comprises means (42) for receiving a TS signal of a DVB-H standard for storage in accordance with a first bit rate, means (46) for sequentially generating NULL packets in accordance with a second bit rate, and means (45) for outputting a packet which forms part of the stored TS signal from the means (42) and the NULL packet from the means (46) in accordance with the second bit rate. The apparatus may further comprise means (51) for receiving the TS signal of the DVB-H standard to remove NULL packets from the TS signal. Alternatively, the apparatus may further comprise means (61) for receiving the TS signal of the DVB-H standard to pass only a packet representative of a program which constitutes the TS signal, and a PSI/SI packet.

Abstract: A digital satellite broadcast receiver capable of an optimum signal reception even when an arbitrary outdoor unit is connected. Please noise characteristics of an outdoor unit connected to a digital satellite broadcast receiver when receiving a burst symbol is estimated based on a bit error rate of an 8PSK modulation signal determined by a trellis decoder (7) when a CNR measured by a CNR measurement circuit (5) is equal to a preset value, and, based on the estimated phase noise characteristics of the outdoor unit, a filter factor of a loop filter (9) inserted into a carrier regenerative loop is set.

Abstract: A test signal generator 2 comprises a Pseudo Random Binary bit Sequence generator 20 for generating a Pseudo Random Binary bit Sequence in the form of burst while holding the continuity of the code, and intermittently operates in a burst form in response to operation control signals from circuits 22, 24. During one burst duration, a string of Pseudo Random Binary bit Sequence is generated in a certain sequence, where the first codes in the Pseudo Random Binary bit String generated in this burst duration follows the last code of a Pseudo Random Binary bit String generated in the preceding burst duration.

Abstract: An optical power measuring apparatus for measuring a power level of an optical signal comprised of a light intensity modulated signal, received by a light receiving element is provided. In the apparatus, a first signal path including a first voltage detection circuit and a first amplifier circuit supplies a processor with a first signal having a voltage proportional to a current flowing through a light receiving element (PD), and a second path including a TIA, a DC detection circuit and a second amplifier circuit supply the processor with a second signal. The second signal corresponding to an envelope of a voltage from the TIA.

Abstract: A latch is provided for rapidly stabilizing a latching operation. The latch comprises a first latch circuit for latching a first signal in response to a first portion of a second signal to generate a first latch signal, and a latch error compensator for compensating a latch error in the first latch signal generated by the first latch circuit to generate a compensated latch signal.

Abstract: An apparatus for monitoring a video signal comprises means for detecting a gamut error in an R component, means for detecting a gamut error in a G component, and means for detecting a gamut error in a B component. The means for detecting a gamut error in the R component includes: means for generating a first condition Y>S?a×Pr (where a is a predetermined coefficient) and a second condition Y<T?a×Pr from a Pr component of a Y/color difference component signal and an upper limit value S and a lower limit value T of the RGB component signal. The apparatus further comprises means for making a gamut error state visually recognizable with respect to the R component when the first condition or the second condition is satisfied.

Abstract: A vector waveform correction device corrects a vector waveform displayed on a vector scope. A first color difference signal and a second color difference signal demodulated from a chrominance signal of a composite video signal are input as x and y, and a vector (x, y) is partially rotated in a unit of part of all the scanning lines.

Abstract: The present invention reduces a burden on an observer. A video signal level display device includes setting sections (24, 25, 26) for setting maximum effective values corresponding to R, G, and B components, respectively, of an RGB component signal, calculating sections (21, 22, 23) for calculating respective coordinates of the R, G, and B components so that the maximum effective values concentrate at one point, generating section (27) for generating straight scale data corresponding to the R, G, and B components, respectively, so that the maximum effective values concentrate at one point, and display section (29) for displaying the respective coordinates of the R, G, and B components and the respective straight scale date (61, 62, 63, 71, 72, 73, 74, 75, 75) on the R, G, and B components.

Abstract: A measuring instrument 50 comprises: a) means which is fed with a video output signal, and performs RGB processing on the video output signal to generate graphic data; b) means for measuring a video signal level in the graphic data, and generating video signal level data; and c) means for generating display data including the graphic data and the video signal level data. A display device 10 comprises: a) means for receiving the display data from the measuring instrument 50; and b) means for visualizing the display data and displaying an image and a video signal level.