Pioneer Electronic Corporation

Masami Suzuki

Junichi Yoshio

Osamu Watanabe

Masayasu Yamashita

Masami Tsuchida

Koji Yamagishi

Hiroyasu Eguchi

Kiyoshi Iwai

Akihiro Nakamura

The signal switching ouput device comprises an attenuator which attenuates a brightness of an input image signal, a first switching means which alternatively outputs an output from said attenuator or said input image signal, delay circuits which delay a character signal by a specified time, a second switch which alternatively provides an output from said first switch and a character signal delayer by the specified time, and an switch instructing means which switches between said first switch and said second switch according to said character signal, and outputs an RGB signal showing a character while delaying it and lowers a brightness level of input image signals composing a background image during a specified period before and after the output of the RGB signal, so that a character displayed on a display unit is trimmed by a dark lines and are very easy to recognize.

Signal switching output device

A disc data display unit provided separately from a disc player. In the display unit is, data inherent to a disc loaded in the disc player and data arbitrarily provided by the operator are stored in a memory medium to form an electronic file, so that the data on the disk will be displayed when the disc player is operated.

Disc data display unit

Method of recording and reproducing picture information and a recording medium on which the picture information is recorded by the method, and an apparatus for playing such a recording medium. In addition to a coded information signal, graphic codes including picture information occupying N (N being a natural number equal to or greater than 2) channels and inserted as the subcode of the coded information signal are recorded on the recording medium. One of the graphic codes which occupies one of the N channels consists of at least a code train group obtained by arranging consecutively a plurality of code trains which relate to a series of information obtained by said coded information signal and include picture information of the same picture. At the time of playing of the recording medium, only one of the graphic codes occupying the one of said N channels is stored in a memory in response to a command and a picture signal corresponding to contents stored in the memory is generated.

Method of recording and reproducing picture information, recording

An apparatus for reproducing and processing picture information for forming a picture signal corresponding to a graphic code obtained from a recording medium on which, in addition to a video format signal and a coded information signal, graphic codes including picture information are recorded, the graphic codes being inserted as a subcode of the coded information signal, and for mixing the picture signal in the video format signal obtained from the recording medium. The apparatus is provided with a display mode changing device for changing a mode of display of the picture signal in response to the display mode changing command. According to another feature, a plurality of memories for storing a plurality of graphic codes are provided, and a graphic code of a designated channel is read-out when the designation of channel is changed.

Apparatus for reproducing and processing picture information including

An input data processor of the present invention has a dither signal adder for adding a dither signal to digital data which corresponds to an alternating signal of the type which crosses the zero level each time the alternating signal varies from a maximum to a minimum (i.e., positive max to negative max). The resultant signal of the digital signal added to the dither signal is sent to a level shift circuit which shifts the digital data output from the adder to a positive or negative level, which has sufficient magnitude to prevent the signal from crossing the zero level during variation from max to min. By eliminating zero crossing with this shifting operation, the present invention prevents inversion of the MSB of the digital signal, which also prevents glitches in the analog output. These glitches were previously caused by inversion of the MSB.

Input data processor for D/A converter utilizing dithering

Method of recording and reproducing picture information and a recording medium on which the picture information is recorded by the method, and an apparatus for playing such a recording medium. In addition to a coded information signal, graphic codes including picture information and audio codes made up of codes by which data can be compressed at a compression rate higher than that of the coded information signal. The graphic codes and said audio codes are inserted as the subcode of the coded information signal together with identification codes indicating whether the codes include the picture information or the audio information. At the time of playback of the recording medium, the subcode is demodulated in accordance with the identification codes.

An apparatus for reproducing and processing picture information for forming a picture signal corresponding to a subcode obtained from a recording medium on which, in addition to a coded information signal, graphic codes including picture information occuyping N (N being a natural number equal to or greater than 2) channels and a recording medium code for specifying the recording medium are recorded, the graphic codes and the recording medium code being inserted as the subcode of the coded information signal. The apparatus is provided with a program memory, an instruction generating device for generating an instruction for designating a channel to be selected out of the N channels by a manual operation during playing of the recording medium, a designated channel data generating device for outputting, in response to a program-play command, a designated channel data indicating a channel designated by the instruction stored in the program memory so that the picture signal is generated from a graphic code occupying a channel of the N channels designated by the designated channel data.

Apparatus for reproducing and processing picture information from a

A data reproducing device having a reading device for reading digitally recorded music data and image data from a data carrier, and data processing device for forming a music signal and an image signal according to the music data and image data thus read, and applying the music signal and image signal to a sound generating apparatus and display device, respectively, wherein the data processing device monitors time data recorded in the record carrier, and suspends, upon detection of the discontinuity of the time data, the image reproduction by the display device.

Data reproducing device controlling image display dependent upon loss of

A dither circuit including an adder for receiving an input signal and a dither signal which is generated by a dither signal generator, a level detection circuit for detecting the signal level of the input signal, and a dither control circuit for stopping the feeding of the dither signal to the adder when the level detection circuit detects that the signal level of the input signal is zero.

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Tokorozawa, Japan

Masami Suzuki