Viterbi decoder for decoding error-correcting encoded information symbol string
An object of the present invention is to provide a Viterbi decoder capable of preventing the increase in the scale of path-memory circuits despite an increase in the number of bits of an information s... Read More
Inventors: Todoroki, Toshiya;, Assignee: NEC Corporation (JP) |
Device for coding/decoding data for a medium
What is claimed is: 1. A device for introducing digital data into a medium by means of a bivalent status quantity thereof, said device comprising: (a) an input for receiving an interleaved data stream... Read More
Inventors: De Niet, Edmond;, Assignee: U.S. Philips Corporation (New York, NY) |
Method and apparatus for encoding and recovering binary digital data
Accordingly, it is a principal object of the present invention to provide a new encoding and concomitant recovery technique which provides for self-clocking while simultaneously affording substantiall... Read More
Inventors: Jacoby, George V.;, Assignee: Sperry Corporation (New York, NY) |
Method and apparatus for encoding digital data
In accordance with this invention, a data encoding technique is described, wherein an encoded digital signal is produced having transitions therein, the separation between succeeding transitions repre... Read More
Inventors: Tanaka, Masato; Furukawa, Shunsuke;, Assignee: Sony Corporation (Tokyo, JP) |
System and method for self-adaptive maximum likelihood sequence detection
The present invention is directed to an improved system and method for maximum likelihood sequence detection where an incoming stream of symbols subjected to intersymbol interference (ISI) are decoded... Read More
Inventors: Shah, Ali R.;, Assignee: Ericsson Inc (Research Triangle Park, NC) |
Method and apparatus to correct for in-phase and quadrature-phase gain imbalance in communication circuitry
OF THE PREFERRED EMBODIMENT While the specification concludes with claims defining the features of the invention that are regarded as novel, it is believed that the invention will be better understoo... Read More
Inventors: Bastani, Babak; Bautista, Edwin E.; Heck, Joseph P.;, Assignee: Motorola, Inc. (Schaumburg, IL) |
Method and apparatus for restoring a thermal response signal of a magnetoresistive head
The present invention is an apparatus and method for reading an information signal from a magnetic storage medium using a magnetoresistive (MR) element, modifying the signal such that a thermal compon... Read More
Inventors: Smith, Gordon J.; Ottesen, Hal Hjalmar;, Assignee: International Business Machines Corporation (Armonk, NY) |
Circuitry for correction of thermal transients in the analog signal from a magnetoresistive sensor
OF THE INVENTION Prior Art The present invention will be described and illustrated in terms of its application to magnetic recording rigid disk drives. However, the invention is also applicable to an... Read More
Inventors: Klaassen, Klaas Berend; Reay, Richard James;, Assignee: International Business Machines Corporation (Armonk, NY) |
Method and device utilizing erasure information as a reliability indicator in an information medium
It is an object of the present invention to provide a method and a device for implementing the method in a transmission system or provide an information processing system in which the possibilities fo... Read More
Inventors: Bergmans, Johannes W. M.; Voorman, Johannes O.; Brittenham, Steve;, Assignee: U.S. Philips Corporation (New York, NY); Hewlett-Packard Company (New York, NY) |
Method and apparatus for reduced-complexity viterbi-type sequence detectors
A Viterbi detector, such as may be used to demodulate partial-response signals or to decode convolutional codes, is modified to reduce its implementation complexity. In the case of demodulation, a par... Read More
Inventors: Behrens, Richard T.; Anderson, Kent D.; Glover, Neal;, Assignee: Cirrus Logic, Inc. (Fremont, CA) |
Error correction systems with modified Viterbi decoding
According to a feature of the invention, these objects are obtained in a communication system using a convolutional code by reading successive words from a channel, calculating selected metric increme... Read More
Inventors: Cox, Richard V.; Thorkildsen, Reed; Zhou, Yong;, Assignee: AT&T Corp. (Murray Hill, NJ) |
Signal correlation technique for a receiver of a spread spectrum signal including a pseudo-random noise code that reduces errors when a multipath signal is present
This and additional objects of the present invention are realized, briefly and generally, by maintaining the characteristics of one or both of the carrier and code correlator loops that are best for t... Read More
Inventors: Garin, Lionel; Zhodzicshsky, Mark; Veitsel, Victor; Sila-Novatisky, Stanislov; Kamgar, Farbod;, Assignee: Magellan Corporation (Santa Clara, CA) |
Viterbi decoder with pipelined ACS circuits
It is therefore an object of the present invention to provide a Viterbi decoder in which a high speed operation is achieved by having a plurality of ACS circuits operate continuously on a pipelined ba... Read More
Inventors: Andoh, Takeshi;, Assignee: NEC Corporation (Tokyo, JP) |
Erasure based instantaneous loop control in a data receiver
It is an object of the present invention to prevent this negative impact. More specifically it is an object of the present invention to provide a receiver which is capable of taking instantaneous meas... Read More
Inventors: Voorman, Johannes Otto; Bergmans, Johannes Wilhelmus Maria; Wong-Lam, Ho Wai;, Assignee: Koninklijke Philips Electronics N.V. (Eindhoven, NL) |
Priority interrupt logic circuits
The above objects are achieved in a preferred embodiment of the present invention which comprises priority interrupt apparatus for processing interrupts from a plurality of channels or ports. The appa... Read More
Inventors: Kristick, Lawrence J.; Crawford, Knute S.; Calle, Jaime;, Assignee: Honeywell Information Systems, Inc. (Waltham, MA) |
Apparatus for reducing a sampling frequency
It is an object of the present invention, therefore, to overcome the disadvantages and limitations of a prior apparatus for reducing a sampling frequency by providing a new and improved apparatus for ... Read More
Inventors: Sakaki, Hiroshi; Shintani, Sotokichi;, Assignee: Kokusai Denshin Denwa Co., Ltd. (Tokyo, JP) |
Multiport multidrop digital system
It is therefore an object of the invention to provide a substantially error-free polled digital multiport multidrop system. It is another object of the invention to provide a digital multiport multidr... Read More
Inventors: Duggan, Robert J.; Ho, Tat N.;, Assignee: General DataComm, Inc. (Middlebury, CT) |
Method for network configuration via third party query
According to the invention, in a mesh network, newly powered-up nodes acquire information about nearby nodes through a third-party query of a node with which communication has been established. Each n... Read More
Inventors: Flammer, III, George H.; San Filippo, III, William E.;, Assignee: Metricom, Inc. (Los Gatos, CA) |
X-Ray diagnostic installation for providing subtraction images
The invention proceeds from the objective of producing an X-ray diagnostic installation of the type initially cited wherein the entire amplitude range of the A/D converter is employed for the subtract... Read More
Inventors: Haendle, Joerg; Maass, Wolfgang;, Assignee: Siemens Aktiengesellschaft (Berlin & Munich, DE) |
Contactless test method for integrated circuits
A method is provided for contactless testing of integrated circuits and particularly selective testing of segments and modules of high density integrated circuits. Specifically, small circuit segments... Read More
Inventors: Malmberg, Paul R.; Handy, Robert M.; Stoneburner, Donald F.; Green, David;, Assignee: Westinghouse Electric Corporation (Pittsburgh, PA) |
Lateral weave gaging system
OF THE INVENTION A preferred embodiment of the measuring system of the invention is disclosed hereinafter. It is advantageously located on the exit side of the side shear. As will be noted from FIG. ... Read More
Inventors: Bautz, James E.;, Assignee: Kaiser Steel Corporation (Oakland, CA) |
Interpolative method and system for producing medical charts and monitoring and recording patient conditions
The present invention is titled "Data Base Management System With Nested Time Axes" and is referenced by the abbreviation "DBMS with NTA". The DBMS with NTA works in conjunction with the Computed Medi... Read More
Inventors: Kumagai, Yasuo;, Assignee: |
Information storage system
According to the International application published under the patent cooperation treaty WO 94/25919, the primary data control unit is provided with a primary data information system, the secondary da... Read More
Inventors: Kimura, Takahisa; Koide, Takeshi; Saitsu, Yasushi; Nagasawa, Teruo;, Assignee: Hitachi, Ltd. (Tokyo, JP); Hitachi Software Engineering Co., Ltd. (Yokohama, JP) |
Hardware prefetch system based on transfer request address of cache miss load requests
Accordingly, the present invention preferably provides a system and method to shorten the memory-access latency, even if data to be prefetched are in sequential addresses, which may thereby lessen the... Read More
Inventors: Nakamura, Tomohiro;, Assignee: Hitachi, Ltd. (Tokyo, JP) |
Prefetch queue
Embodiments of the present invention provide a prefetch queue for an agent that can detect request patterns in both an ascending direction in memory and a descending direction in memory. Having detect... Read More
Inventors: Hill, David L.; Prudvi, Chlnna B.;, Assignee: Intel Corporation (Santa Clara, CA) |
Cache memory system for multiple processors with collectively arranged cache tag memories
It is therefore an object of the present invention to provide a cache memory system capable of realizing a high speed processing with a simple control, even for a relatively large scale processing sys... Read More
Inventors: Saito, Mitsuo;, Assignee: Kabushiki Kaisha Toshiba (Kawasaki, JP) |
Multichannel generator
What is claimed is: 1. Multichannel generator constituted by a frequency synthesizer for producing an output signal variable through a plurality of channel frequencies spaced by uniform frequency step... Read More
Inventors: Noordanus, Johannes; Verstraelen, Marie Marcel Arnold Antoine Ghislain;, Assignee: U.S. Philips Corporation (New York, NY) |
Lens-fitted photographic film unit
To achieve the above object in a film unit having an optical viewfinder incorporated therein, the present invention provides a plate for holding lens elements of the viewfinder and having supporting p... Read More
Inventors: Kameyama, Nobuyuki; Katsura, Hirofumi;, Assignee: Fuji Photo Film Co., Ltd. (Kanagawa, JP) |
High-performance, superscalar-based computer system with out-of-order instruction execution and concurrent results distribution
Thus, a general purpose of the present invention is to provide a high-performance, RISC based, super-scaler processor architecture suitable for ready architectural enhancement through the addition and... Read More
Inventors: Nguyen, Le Trong; Lentz, Derek J.; Miyayama, Yoshiyuki; Garg, Sanjiv; Hagiwara, Yasuaki; Wang, Johannes; Lau, Te-Li; Wang, Sze-Shun; Trang, Quang H.;, Assignee: Seiko Epson Corporation (Tokyo, JP) |
Out-of-order load/store execution control
It has been discovered that loads and stores may generally be executed independently and out-of-order with respect to each other in a processor which provides an out-of-order load-store execution cont... Read More
Inventors: Favor, John G.; Ben-Meir, Amos; Stapleton, Warren G.; Trull, Jeffrey E.; Roberts, Mark E.;, Assignee: Advanced Micro Devices, Inc. (Sunnyvale, CA) |
Fault Detection 
