Abstract: Methods and apparatuses for displaying broadcast history information of a plurality of episodes of a program on an audio-visual system, which enable a viewer to select a program for which the history information of each episode will be stored. In response to the viewer's selection, the audio-visual system stores the history information for the episodes of the selected program that has been received by the audio-visual system. The audio-visual system can display the history information when the viewer watches the current episode of the program in a future time.

Abstract: Methods and apparatuses for displaying broadcast history information of a plurality of episodes of a program on an audio-visual system, which enable a viewer to select a program for which the history information of each episode will be stored. In response to the viewer's selection, the audio-visual system stores the history information for the episodes of the selected program that has been received by the audio-visual system. The audio-visual system can display the history information when the viewer watches the current episode of the program in a future time.

Abstract: A three-dimensional video signal generator has a high-definition video signal source for generating left and right high-definition video signals having, as left and right video signals, video signals in respective effective scanning periods of odd-numbered and even-numbered field signals of a interlaced-scanning high-definition video signal composed of 1125 scanning lines and having an interlace factor of 2:1. The left and right video signals in the respective effective scanning periods of the left and right high-definition video signals supplied from said high-definition video signal source are vertically compressed in time with a compression ratio of 11:5.

Abstract: Items related to the quality of an on-screen image such as brightness, sharpness, chroma, etc. and items related to the audio quality such as bass, treble, balance, etc. in a CRT display, such as a television receiver, are subject to adjustment by a user. These items are originally classified into those in a first class and those in a second class in accordance with the nature of a respective item, that is, whether a user must know the current analog value of the item before he or she adjusts it. When an instruction is input through user's manipulation to adjust the analog value of an item to be controlled, the system determines whether the item belongs to the first class or the second class. If it belongs to the first class, the system first confirms that the item and its actual analog value are displayed on a screen, then permits adjustment of the analog value in response to the instruction, and then displays a new analog value.

Abstract: A home-bus-information display system arranged such that the control status of each of a plurality of home apparatus can be monitored via home bus-lines and additively displayed over a video program on the picture screen of a television receiver to allow a viewer to monitor the control status of each of other home electric apparatus, a security system and so on in a centralized-control fashion.

Abstract: A method and apparatus for use with a television receiver that processes a television signal in digital form and that has the functional units of the receiver controlled by digital data stored in internal registers, in which a dedicated non-volatile memory is provided for storing initial data along with a control circuit for setting such initial data into the appropriate register so that when the receiver is adjusted for the first time following manufacture spurious data will not cause circuit elements of the receiver to be damaged.

Abstract: A ghost cancelling system has a transversal filter connected to a video signal source to produce a ghost cancelling signal, composed with a video signal from the video signal source by use of a composer. A circuit is provided for detecting a ghost level during a predetermined period, including a masking pulse forming circuit and a detecting circuit for detecting a reference time point, a circuit for forming a standard waveform from the output of the detecting circuit, a circuit for subtracting the standard waveform from the video signal derived from the composer, and a circuit for detecting a ghost level from the output of the subtracting circuit. A signal derived from the masking pulse is supplied to the transversal filter for controlling its operation.

Abstract: A reference time detecting circuit for detecting a predetermined transit of a synchronizing signal taken as a reference time of a video signal detects the reference time by using a masking pulse including the predetermined transit and the video signal. The level for detecting the transit is set at a side over a half level of the synchronizing signal level, and a detecting signal and the masking pulse are supplied to a flip-flop circuit (60) from which an output signal is derived. Since the level for detecting the transit is set at the side over the half level of the synchronizing signal level, the reference time can be detected by a first pulse in a range of the masking pulse. Furthermore, since this signal and the masking pulse are supplied to the flip-flop circuit (60), a reference time signal can be formed quite easily.

Abstract: A reference time detecting circuit has a video signal supplied to first and second clamping circuits (40) and (70) of different time constants and a synchronizing signal is separated from the output signal from the first clamping circuit (40) of a longer time constant, while a reference time is detected from the output signal from the second clamping circuit (70) of a shorter time constant. Consequently, since the two clamping circuits (40) and (70) of different time constants are provided, the clamping circuit (40) of longer time constant generates a signal having a sync-tip portion of a predetermined voltage to perform the accurate vertical synchronizing separation from which an accurate masking pulse is formed, while the clamping circuit (70) of shorter time constant generates a signal having a pedestal portion with a noise suppressed to thereby positively detect the rising edge of the synchronizing signal.

Abstract: A ghost cancelling system having a transversal filter including a weighting circuit and a memory, a power responsive circuit for detecting the time when a power switch is turned on, and an activating circuit connected between the power responsive circuit and the storage capacitor for charging the latter during a predetermined period when the power switch is turned on.

Abstract: A ghost cancelling system is disclosed which includes an input terminal applied with a video signal including a ghost signal component, a ghost cancelling circuit connected to the input terminal, the ghost cancelling circuit including a transversal filter, and an output terminal connected to the ghost cancelling circuit for deriving an output video signal in which the ghost signal component is substantially suppressed. In this case, the transversal filter comprises the combination of a common delay circuit used for a signal delay circuit and for a demultiplexer circuit in time divisional manner, a memory circuit connected to the common delay circuit and activated when the common delay circuit is used for the demultiplexer circuit, and a weighting circuit connected between the memory circuit and the common delay circuit.

Abstract: A ghost cancelling system for eliminating a ghost by using a ghost cancelling signal formed from an input video signal including the ghost and adding the ghost cancelling signal to the input video signal. In this ghost cancelling system, the divergence of the ghost cancelling circuit is avoided during the transient time of the channel selection or during the ghost cancelling process, and when there is the possibility that the ghost cancelling circuit diverges, the circuit is firstly made operable as a feed-forward type circuit for a predetermined period and thereafter made operable as a feedback type circuit.

Abstract: A television receiver is disclosed in which there are provided a television signal receiving circuit including RF and IF stages; a video detector connected to the television signal receiving circuits; an AGC circuit connected between the video detector and television signal receiving circuit for automatically controlling the gain of the latter, the AGC circuit having a predetermined time constant; and a ghost detector connected to the video detector for detecting a ghost signal during a certain period in a vertical blanking period of the video signal from the video detector. In this case, a switching device is provided for switching the AGC circuit at least during the certain period in the vertical blanking period such that the detected ghost level is not substantially influenced by the transient level change of the AGC circuit.