1
Takahito Seki, Hajime Inoue, Chihoko Takizawa: Adaptive equalizer for magnetic reproducing apparatus. Sony Corporation, William S Frommer, Alvin Sinderbrand, September 12, 1995: US05450253 (36 worldwide citation)

The characteristic of a regenerative signal from a magnetic head 11 is compensated by a filter 14 serving as an equalizer. The regenerative signal thus compensated is then decoded at a decoder 15. An adaptive control unit 17 adjusts (modifies) the characteristic of the filter 14 on the basis of a de ...


2
Takahito Seki: Bit manipulation instructions. Sony Corporation, Sony Electronics, Finnegan Henderson Farabow Garrett & Dunner L, June 12, 2001: US06247112 (22 worldwide citation)

Methods and systems for bit manipulation instructions are disclosed. The instruction srlmsk shifts a value stored in a first register based on a shift value stored in a second register and loads N bits from the shift register to a third register using a single instruction. The instruction concat loa ...


3
Hajime Inoue, Takahito Seki, Keiji Kanota: Apparatus for detecting digital data. Sony Corporation, William S Frommer, Alvin Sinderbrand, October 19, 1993: US05255128 (20 worldwide citation)

In an apparatus for detecting input digital data, for example, as derived by analog-to-digital conversion of a reproduced binary signal in analog form; a distributor circuit distributes the input digital data into at least two channels, a processing circuit in each channel processes the respective d ...


4
Keiji Kanota, Takahito Seki: Digital recorder using partial response method. Sony Corporation, Hill Van Santen Steadman & Simpson, December 5, 1989: US04885646 (14 worldwide citation)

A digital recording and reproducing system for ME tape uses a class 4 partial-response encoder in the recording apparatus and a corresponding decoder in the reproducing apparatus. A high signal-to-noise ratio is achieved without the need for a phase equalizer.


5
Takahito Seki: Digital video tape recorder with data block ID signal error correction. Sony Corporation, William S Frommer, Alvin Sinderbrand, April 4, 1995: US05404249 (13 worldwide citation)

In a digital video tape recorder that has rotary magnetic heads for recording digital video information on a magnetic tape in the form of data blocks having a predetermined length, an ID signal is generated for each data block. The ID signal includes a number of data bits which identify the address ...


6
Keiji Kanota, Hajime Inoue, Takahito Seki: Digital signal recovery apparatus with minimized high frequency noise. Sony Corporation, Alvin Sinderbrand, William S Frommer, February 18, 1992: US05089917 (12 worldwide citation)

Apparatus for regenerating a coded digital signal, comprising an interference cancellation equalizer for cancelling an interference component from an input digital signal and a decoder. The equalizer includes a compensator for high frequency compensating the input digital signal, an extractor for ex ...


7
Hajime Inoue, Takahito Seki, Keiji Kanota: Digital information transferring apparatus capable of identifying the type of device supplied with the transferred information. Sony Corporation, William S Frommer, Alvin Sinderbrand, July 18, 1995: US05434673 (10 worldwide citation)

In a digital information signal transferring apparatus for transferring sequential sync block data composed of encoded synchronous, ID and digital information signals, the digital information signal is encoded and an insertion area is formed therein, whereupon, an ID signal is added in the insertion ...


8
Michio Nagai, Takahito Seki: Digital video tape recorder. Sony Corporation, William S Frommer, Alvin Sinderbrand, June 29, 1993: US05223991 (9 worldwide citation)

In a digital signal reproducing apparatus for detecting identifying data in a reproduced digital data signal which had been recorded on slant tracks formed sequentially on a magnetic tape by a rotary head and which is reproduced at a speed higher than a normal playback speed, a synchronizing detecto ...


9
Hajime Inoue, Takahito Seki, Keiji Kanota: Apparatus for reproducing data recorded on a magnetic recording medium. Sony Corporation, William S Frommer, Alvin Sinderbrand, December 14, 1993: US05270876 (8 worldwide citation)

A magnetic recording and/or reproducing device uses a Viterbi decoding circuit wherein, when data falls within a predetermined range, the level of the reproduced signal is sensed and the level of the reproduced signal is corrected in a manner which reduces bit error caused by noise in the reproduced ...


10
Takahito Seki, Hajime Inoue, Chihoko Takizawa: Magnetic reproducing apparatus. Sony Corporation, William S Frommer, Alvin Sinderbrand, November 1, 1994: US05361174 (7 worldwide citation)

Respective regenerative signals from magnetic heads 1A, 1B are combined into one system through a changeover switch 9. After the reproducing characteristic is compensated by using a filter 4 serving as an equalizer, that combined signal is decoded at a decoder 5. An adaptive control unit 7 adjusts ( ...