Hitachi, Ltd.

Hitachi Video Engineering, Incorporated

Tadashi Takamiya

Norio Minami

Isao Fukushima

Tomishige Yatsugi

Yoshito Nejime

Nobuo Hataoka

Juichi Morikawa

Yasufumi Yumde

Yasunori Kawauchi

Yoshihiro Shibata

Yukio Kumagai

Hiroshi Toeda

Noboru Katono

The speed of an input speech is changed without any change of the pitch of the input speech. Raw data of a speech are stored so that the speed of the speech can be modulated continuously on the basis of the raw data of the speech. In the speech speed conversion method, a speech speed conversion process for the input speech is carried out in a period designated when speech speed conversion is needed, which the speech speed conversion is not carried out in the other period. Further, in the speech speed conversion apparatus having a unit for inputting a speech, a speech speed conversion unit for changing the speed of the input speech, and a unit for supplying the output of the speech speed conversion unit as an output speech to listener's ears, the apparatus further includes a speech speed conversion switch, and a unit for outputting a speech while changing the speech speed of the input speech in a period in which the speech speed conversion switch is turned on, but for outputting a speech without any change of the input speech in the other period in which the speech speed conversion switch is turned off.

Audio signal storing apparatus having a function for converting speech

A preamplifier circuit for amplifying a video signal reproduced by a magnetic head includes a positive feedback circuit for reducing an input capacitance thereof. A negative feedback circuit may be added thereto for stabilizing an operation of the preamplifier.

Video signal preamplifier circuit

An automatic cassette loading apparatus in which a tape cassette containing a magnetic tape is held and transported forwardly and returned between a cassette insertion position and a cassette loaded position. The number of switches is reduced by use of a rotary cam and a drive arm, and a drive motor and the switches are combined on the same printed circuit board.

Automatic cassette loading apparatus

A horizontal synchronizing signal contained in a composite video signal undergoing a phase fluctuation is phase modulated and substituted for the original horizontal synchronizing signal. The phase modulation of the horizontal synchronizing signal of the input signal is effected at a phase modulation circuit and then the phase modulated signal is applied to an AFC circuit unit which has the same transfer characteristic as that of a horizontal AFC circuit of an ordinary television receiver set. The phase modulation circuit is controlled by a signal in response to a phase difference between the output of the AFC circuit unit and the original horizontal synchronizing signal. A composite video signal containing the horizontal synchronizing signal subjected to the phase modulation in this manner is applied to the television receiver set, thereby displaying a picture image free from the fluctuation.

System for compensating jitter of video signal

Growing community of inventors

Nakaminato, Japan

Tadashi Takamiya