1
Hiroo Okamoto, Masaharu Kobayashi, Takaharu Noguchi, Takao Arai: Method and apparatus for recording digital signals. Hitachi, Antonelli Terry & Wands, July 21, 1987: US04682332 (55 worldwide citation)

Error detection/correction codes appended to a recording signal for a PCM recorder are so arranged as to ensure detection and/or correction of a dropout or error of a data block address in the reproduction of the recording signal. In recording digital signals on a recording medium, the digital signa ...


2
Masaharu Kobayashi: Integrated circuit semiconductor device having improved wiring structure. NEC Corporation, Laff Whitesel Conte & Saret, April 25, 1989: US04825276 (42 worldwide citation)

An integrated circuit semiconductor device having an improved power supply wiring structure is disclosed. The wiring includes a wide conductive layer and a plurality of stripe type narrow conductive layers formed on the wide conductive layer via an insulating film. Each of stripe type conductive lay ...


3
Hiroo Okamoto, Masaharu Kobayashi, Hiroyuki Kimura, Takaharu Noguchi, Takao Arai: Decoding method and system for doubly-encoded Reed-Solomon codes. Hitachi, Antonelli Terry & Wands, February 24, 1987: US04646301 (31 worldwide citation)

Error correction of digital signals is suited for codes having error detection and correction words, such as doubly-encoded Reed-Solomon code. In a first decoding, at least error detection is effected and flags indicating decoding conditions are added. In a second decoding, error detection for first ...


4
Hiromichi Tanaka, Hiroyuki Kimura, Tsutomu Noda, Takao Arai, Masaharu Kobayashi, Shigeki Inoue: Digital player using a pulse width detector. Hitachi, Antonelli Terry & Wands, December 31, 1985: US04562549 (31 worldwide citation)

In a pulse width detector circuit, a high-level pulse width and a low-level pulse width of a digital signal derived by slicing an analog signal reproduced from a disc at a predetermined level are independently measured and maximum or minimum values thereof in a predetermined time interval are stored ...


5
Tadao Matsunaga, Masaharu Kobayashi: Electrostatic chuck device. Tomoegawa Paper, Oblon Spivak McClelland Maier & Neustadt P C, July 3, 2001: US06256187 (31 worldwide citation)

An electrostatic chuck device is characterized in the provision of a ceramic layer, which serves as an adsorption surface, via an electricity insulating elastic layer, and an electrode that is formed between the ceramic layer and the electricity insulating elastic layer. The electricity insulating e ...


6
Hiroo Okamoto, Masaharu Kobayashi, Takaharu Noguchi: Method and apparatus for recording and/or reproducing PCM signals. Hitachi, Antonelli Terry & Wands, July 19, 1988: US04758907 (26 worldwide citation)

When a PCM signal having a sampling frequency of 32 KHz, a quantization of 12 bits per sample, and 4 channel is to be recorded onto tape, the PCM signal undergoes, prior to being recorded onto the tape, such predetermined data dispersion that burst errors incurred in the reproduction operation may b ...


7
Hiroaki Takahashi, Masaharu Kobayashi, Takaharu Noguchi, Toshifumi Shibuya, Takao Arai: Rotary head type PCM recording and reproduction method and system. Hitachi, Antonelli Terry & Wands, August 4, 1987: US04685004 (26 worldwide citation)

In a recording operation by a rotary head type PCM recording/reproducing apparatus including at least two magnetic heads, the odd-numbered sample data and the even-numbered sample data are discriminatively extracted and stored. The stored data corresponding to an amount of data outputted from the A/ ...


8
Hiroo Okamoto, Masaharu Kobayashi, Takaharu Noguchi, Takao Arai: Rotary-head type PCM data recording/reproducing method and apparatus with a redundancy-reduced control data format. Hitachi, Antonelli Terry & Wands, November 11, 1986: US04622600 (25 worldwide citation)

A rotary-head PCM data recorder in which PCM signals of m in number, a synchronizing signal, control signals related to the PCM signals, and a parity signal for error detection and correction are formed into data blocks, and data blocks of n in number are recorded on one track of a magnetic tape. Am ...


9
Masaharu Kobayashi, Hiroo Okamoto, Takao Arai: Method and apparatus for recording and reproducing a digital signal with a stationary head. Hitachi, Antonelli Terry & Wands, February 24, 1987: US04646170 (23 worldwide citation)

In a stationary head type PCM recorder having an A/D converter for sampling an analog signal and converting the analog signal to a digital signal, a signal processing circuit including data delay means for adding an error detection and correction code and a predetermined signal to the digital signal ...


10
Hiroo Okamoto, Hiroyuki Kimura, Shigeru Yamazaki, Takaharu Noguchi, Masaharu Kobayashi: PCM signal recording and reproducing apparatus including simultaneous error detection/correction. Hitachi, Antonelli Terry & Wands, July 19, 1988: US04758902 (23 worldwide citation)

A PCM signal recording and reproducing apparatus comprises first and second memory circuits, in which PCM signals are read and written using the first memory circuit, while PCM signals stored in the second memory circuit are error-corrected. At the end of writing by the first memory circuit, the fir ...