 Spin-finish lubricating method |
| The embodiments of the invention in which an exclusive property or privilege is claimed are defined ... |
|
| Methods of water flooding and fracturing using clean, non-damaging fracturing fluids |
| What is claimed is: 1. A method of producing hydrocarbon from a subterranean formation comprising: ... |
|
| Thermally energized packer cup |
| The apparatus of the present invention includes a packer cup having a tapered elastomer body and a ... |
|
| Hand tool with intersecting pronged wheels |
| The present invention seeks to further improve these known advantageous manually operable devices, ... |
|
| Method for the preparation of xylose solutions |
| What is claimed is: 1. A method for the preparation of xylose solutions from oat husks which ... |
|
| Method of assembling a settling tank |
| We claim: 1. A method for assembling a settling tank for resolving a mixture of oil, solids, and ... |
|
| Automobile antenna system |
| In view of the above-described problems of the prior art, it is an object of the present invention ... |
|
| In-furnace level meter and antenna therefore |
| An object of the present invention is to provide an in-furance level meter which can measure a slag ... |
|
| Phase linear interferometer system and method |
| We claim: 1. A phase linear interferometer system comprising: at least four antennas for receiving ... |
|
|
Data recording apparatus
| Details |
Inventors: Tajima, Hiroshi;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Williams; Howard L.
Assistant Examiner:
Attorney, Agent or Firm: Frommer Lawrence & Haug LLP, Frommer; William S.
An apparatus for encoding a digital signal includes switching means for alternately outputting the digital signal from first and second output terminals at every bit, a first converting means for converting the digital signal output from the first output terminal to a signal which will be DC free after NRZI conversion is carried out, a second converting means for converting the digital signal output from the second output terminal to a signal which will be DC free, and an encoding means supplied with outputs from the first and second converting means, alternately combining outputs of the first and second converting means at every bit and obtaining a substantially I-NRZI converted digital signal. |
|
DETAILED DESCRIPTION In view of the aforesaid aspect, it is an object of the present invention to provide a data recording apparatus in which an encoded signal can be decoded with ease.
It is another object of the present invention to provide a data recording apparatus in which an encoded signal can be recorded on a magnetic medium satisfactorily.
According to a first aspect of the present invention, there is provided an apparatus for encoding a digital signal which is comprised of a switching means for alternately outputting the digital signal from first and second output terminals at every bit, a first converting means for converting the digital signal output from the first output terminal to a signal which will be DC free after NRZI conversion is carried out, a second converting means for converting the digital signal output from the second output terminal to a signal which will be DC free after NRZI conversion is carried out, and an encoding means supplied with outputs from the first and second converting means, alternately combining outputs of the first and second converting means at every bit and obtaining a substantially I-NRZI converted digital signal.
According to a second aspect of the present invention, there is provided an apparatus for decoding a digital signal which is comprised of a detecting means for detecting in a partial response class 4 a substantially I-NRZI converted digital signal, the I-NRZI converted digital signal being produced by alternately outputting digital signals from first and second output terminals of a switching means at every bit, converting the digital signals output from the first and second output terminals into signals which will be DC free after NRZI conversion is carried out, and combining the converted digital signals alternately at every bit, a switching means for alternately outputting an output of the detecting means from third and fourth output terminals, a third converting means for converting the digital signal output from the third output terminal in a manner opposite to that of the first converting means, a fourth converting means for converting the digital signal output from the fourth Output terminal in a manner opposite to that of the second converting means, and a combining means supplied with outputs of the third and fourth converting means and alternately combining the outputs of the third and fourth converting means at every bit
|
| Related patents |
|
|
HF Antenna matching device
What is claimed is: 1. A HF antenna matching device comprising: a directional coupler having first and second pairs of conjugate ports, said first pair having first and ...
|
|
|
Coprocessor system and method
What is claimed is: 1. A coprocessor system, comprising: (a) antenna means located on a vehicle for sensing global positioning satellite signals; (b) tracker means for ...
|
|
|
Position locating apparatus for an underwater moving body
It is therefore one object of the present invention to provide a position detecting apparatus for detecting the position of an underwater moving body, which can quickly ...
|
|
|
Three dimensional range imaging system
OF PREFERRED EMBODIMENT Referring now to the drawing in detail, FIG. 1 diagrammatically illustrates a 3-dimensional imaging system generally referred to by reference ...
|
|
|
Protective headgear
We claim: 1. A protective headgear comprising: (a) a helmet, (b) a face mask of flexible material, and (c) means securing the face mask to the helmet, (d) the helmet and ...
|
|
|
Apparatus for controlling an internal combustion engine for vehicles
It is an object of the present invention to provide an improved apparatus for controlling an internal combustion engine for vehicles having an electronically controlled ...
|
|
|
FM discriminator having low noise characteristics
OF THE PREFERRED EMBODIMENT Referring now to FIG. 1 of the drawing, there is shown a phase lock discriminator in accordance with a preferred embodiment of the present ...
|
|
|
Lock bottom carton
What is claimed is: 1. A lock bottom carton having a perimeter of four connected walls having hinged top flaps and hinged bottom flaps folded and interlocked to form a ...
|
|
|
Fire-protecting epoxy resins
What I claim is: 1. A fire-protecting epoxy resin, essentially comprising a cured product of an epoxy resin made from a polyfunctional halohydrin and a polyhydric phenol ...
|
|
|
Improvements in and relating to board products
We claim: 1. An autoclaved fire-resistant board product consisting essentially of, in combination, a hydraulic cement binder, water, a mixture of long and short staple ...
|
|
|
Telecommunications 
