This is the generic class for (a) originating or emitting a coded set of discrete signals or (b) translating one code into another code wherein the information signal content remains the same but the formats may differ. For classification herein, at least one of the codes must be a set of pulses or digits and electrical in nature.
LINES WITH OTHER CLASSES
Excluded from this class is analog to analog conversion. See References to Other Classes, below, for examples of other classes containing this subject matter.
Included in this class (341) is subject matter relating to codes, per se, such as Morse codes, grey codes. Excluded from this class are coded records and coded record readers. See References to Other Classes, below,
Combinations of an optically encoded shaft wheel and a photocell absent any signal processing circuitry are classified elsewhere. See References to Other Classes, below.
Code converters which may be utilized in pulse or digital communication systems, Class 375, are classified in this class (341).
A. The combination of the subject matter of this class (341) and another art environment is generally classified with the art device where the environment is significant by virtue of the claimed relationship. For example: Coding and decoding for cryptography
Coding and decoding for error detection or correction
Code transmitters specific to telemetry.
Data compression and expansion
Microwave devices.
Radiowave beacons.
Radar generation, conversion or systems
B. Pulse generation or conversion which is not unique to communications are classified in the appropriate classes. For example:
Pulse demodulation, per se.
Pulse generation.
Pulse modulation, per se
Pulse wave conversion systems; i.e., sine wave to pulse wave See References to Other Classes, below, for appropriate class references.
This class is structured into 14 main divisions. See Subclass References to the Current Class, below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1+, for Digital Pattern Reading Type Converters or generators: subclasses.
20+, for Bodily Actuated Code Generator.
50+, for Digital Code to Digital Code Converters.
108, for Reversible Analog to Digital Converter
109, for Stochastic Techniques.
110, Analog to Digital Conversion Followed by Digital to Analog Conversion.
111+, for Phase or Time of Phase Reversal
118+, for Converter Compensation 120+, Converter Calibration or Testing:
122+, for Sample and Hold
126+, for Analog to or From Digital Conversion
173+, for Code Generator or Transmitter
200, for Quantizers
899, Miscellaneous
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS
178, Telegraphy,
2, for teles:graphic code changers, subclass 26.1 for telegraph printing page translators, and subclass 71 for code transformers in automatic telegraph repeaters.
234, Selective Cutting (e.g., Punching),
69+, for a pattern controlled selective punching device embodying code conversion means. 235, Registers,
429, for electromechanical means to translate the code sensed from a coded record into a different code; subclasses 487+ for coded records and subclasses 435+ for coded record readers.
250, Radiant Energy,
231, for optical or photocell systems having a light valve which is actuated by a shaft encoder or angle indicator
absent any signal processing circuitry, subclass 271 for invisible radiant energy coded record readers, subclasses 555+ for coded record controlled photocell circuits and subclasses 566+ for coded record reading optical or pre-photocell systems; appropriate subclasses for Microwave devices.
307, Electrical Transmission or Interconnection Systems, for analog to analog conversion
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
50+, for signal discriminating or comparing by amplitude, subclasses 100+ for miscellaneous signal conversion or generation, i.e., sine wave to pulse wave, and subclasses 1+ for signal discriminating by various parameters; subclasses 291+ for Pulse generation.
329, Demodulators,
104+, for pulse demodulators or detectors.
332, Modulators,
183, for modulation converters; subclasses 9+ for pulse modulation, per se. 340, Communications: Electrical,
825.3, for intelligence comparison, subclass 825.56 for selective systems with encoding of data, subclasses 870.01+ for telemetring code transmitters, and subclass 870.21 for telemetry with analog to digital conversion.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),
185, for scan conversion in a radar system; subclasses 385+ for radiowave beacons.
156+, for visual display systems with selective electrical control including specified input means.
348, Television,
441+, for television signal format conversion, subclasses 469+ for television signal formatting, and subclasses 384+ for television bandwidth compression or expansion.
358, Facsimile,
426, for facsimile bandwidth compression or expansion.
360, Dynamic Magnetic Information Storage or Retrieval, 32, for analog to or from digital conversion combined with magnetic dynamic recording or reproduction, and subclasses 40+ for dynamic magnetic recording of digital signals in specified codes or formats.
361, Electricity: Electrical Systems And Devices,
171+, for electrical relay systems of the code responsive type.
363, Electric Power Conversion Systems, appropriate subclasses for electrical power conversion as opposed to data conversion.
364, Electrical Computers and Data Processing Systems,
188+, for control system operator interface.
367, Communications, Electrical: Acoustic Wave Systems and Devices,
66, for analog and digital compatible acoustic wave systems and subclass 74 for format conversion in an acoustic wave system.
370, Multiplex Communications,
465+, for adaptive multiplex communications systems, and 477 for bandwidth compression or expansion.
375, Pulse or Digital Communications,
242+, for pulse code modulation of an input analog signal. 377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,
42, for analog to digital or digital to analog conversion of the input or output of such systems.
379, Telephonic Communications,
281, for conversion between dial pulse and tone signals in a telephone switching system, subclass 289 for a translator in a telephone switching system, subclass 339 for signal conversion in telephone repeaters and subclass 353 for conversion of signal form in telephony.
380, Cryptography, appropriate subclasses for electrical cryptos:graphic devices, particularly encoding or decoding for cryptos:graphic purposes, which is excluded from this class (341).
381, Electrical Audio Signal Processing Systems and Devices,
29, 35 for time or bandwidth compression or expansion of an audio signal which may involve analog to or from digital conversion and subclasses 36 through 53 for speech analysis and/or synthesis which may involve analog to or from digital conversion.
382, Image Analysis,
276, for image transformations and subclass 232 for data compression or image coding.
395, Information Processing System Organization,
1, 99 for artificial intelligence including neural nets, and robot control, subclasses 100 through 166 for data presentation/computer s:graphics processing. 455, Telecommunications, for analog to analog conversion.
463, Amusement Devices: Games,
1+, particularly subclasses 36+, for a code generator or conversion device either combined with a game or particularly adapted to serve as an input device for an electronic game.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,
500+, for differential encoding of audio signals.
708, Electrical Computers: Arithmetic Processing and Calculating,
1+, for hybrid computer systems having analog to digital or digital to analog conversion and subclasses 131+ for input means for digital data processors or computers.
709, Electrical Computers and Digital Processing Systems: Multiple Computer or Process Coordinating,
200+, for data transfer among a plurality of spatially distributed computers or digital data processing systems.
714, Error Detection/Correction and Fault Detection/Recovery,
752, 798 for conversion of digital data into error detecting or correcting codes, subclass 810 for error/fault detection techniques for a multilevel code and subclass 823 for error detection by transmission of data and its complement.