| ReturnTo Theme-Group-Choice | Onelevelup |
| 5D080 | Signal processing not specific to the method of recording and reproducing | |
| G11B20/00 -20/04,101@Z;20/20-20/24 | ||
| G11B20/00-20/02@J;20/02@L-20/04,101@Z | AA | AA00 RECORDING SIGNAL MODULATION SYSTEMS |
AA01 | AA03 | AA05 | AA07 | AA10 | |||||
| . Recording of signals without modulation (including bias recording) | . Recording of signals by frequency modulation (FM) | . Recording of signals by amplitude modulation (AM) | . Recording of signals by digital modulation | . Other modulation systems of recording signals | ||||||||
| BA | BA00 RECORDING OF SIGNALS |
BA01 | BA02 | BA03 | BA04 | BA05 | BA06 | BA07 | BA08 | BA10 | ||
| . Voice signals for recording | . . PCM voice signals | . Video signals | . . Still picture signals | . Character signals for recording | . . Teletext broadcasting signals | . Radar signals | . Control signals | . Other recording signals | ||||
| CA | CA00 MULTIPLEXING SYSTEMS FOR RECORDING SIGNALS |
CA01 | CA03 | CA05 | CA10 | |||||||
| . Frequency multiplexing | . Time division multiplexing | . Multi-track multiplexing | . Other multiplexing for recording signals | |||||||||
| DA | DA00 RECORDING AND REPRODUCING DEVICES FOR PROCESSING AND RECORDING SIGNALS |
DA01 | DA02 | DA03 | DA04 | DA05 | DA06 | DA07 | DA08 | DA09 | DA10 | |
| . Tape recording and reproducing devices | . . Having fixed heads | . . . Having fixed heads multi-track tapes | . . Having rotary head tapes | . . . Having rotary head multi-track tapes | . Disk recording and reproducing devices | . . Magnetic disks | . . Optical disks | . . . Write once optical disks | . Other recording and reproducing devices | |||
| EA | EA00 SIGNAL PROCESSING IN RECORDING SYSTEMS |
EA01 | EA02 | EA03 | EA04 | EA05 | EA06 | EA07 | EA08 | EA09 | EA10 | |
| . Switching of input signals | . Discrimination of kind of input signals | . Recording of input discrimination signals | . Pseudo-image signal processing | . Automatic recording of signals | . . Solid memory automatic recording of signals | . Simultaneous recording by a plurality of modulation means for a single signal | . Gain control in recording system signal processing | . . Automatic gain control (AGC) | . . . AGC circuits | |||
| EA11 | EA12 | EA13 | EA14 | EA15 | EA16 | EA17 | EA18 | EA20 | ||||
| . . . . AGC circuits at power on | . . . . Multi-channel AGC circuits | . . Limiter circuits | . . Adjustment of AGC or limiter circuits | . . . Interlocking of AGC circuits with jack | . . . Adjustment of time constant of AGC circuits | . . . Adjustment of AGC level | . . Detection of level of record media | . Fade in, fade out | ||||
| EA21 | EA22 | EA24 | EA27 | EA28 | EA29 | EA30 | ||||||
| . . Fade out at pause | . . Fade out at end of record media | . Adjustment of recording characteristics | . Still picture recording | . . Discrimination of field or frame | . . Detection of non-recording portion of record media | . . Recording on specific track | ||||||
| EA31 | EA32 | EA33 | EA35 | EA36 | EA40 | |||||||
| . . Simultaneous recording of sound and still pictures | . . . Timing for recording of still pictures and sound | . . . Recording of sound on specific sectors | . Recording combined with prevention or re-recording | . . Varying of synchronization signals | . Other recording system signal processing technology | |||||||
| FA | FA00 SIGNAL PROCESSING IN REPRODUCING SYSTEMS |
FA01 | FA02 | FA03 | FA05 | FA06 | FA07 | FA08 | FA09 | |||
| . Discrimination of reproducing signals | . . Discrimination of reproducing signals pertaining to same recording media | . . Discrimination of reproducing signals pertaining to different recording media | . Adjustment of reproducing signal level | . . According to external noise level | . . By use of AGC circuits | . . According to recording media | . . During fast feeding | |||||
| FA11 | FA13 | FA14 | FA15 | FA16 | FA17 | FA18 | FA19 | FA20 | ||||
| . Adjustment of reproducing characteristics | . Elimination of noise | . . Elimination of periodic noise | . . Detection of noise | . . . Recording of reference signals | . . Subtraction of noise components | . . Muting | . . . Muting for portions without recording signals | . . . Fast feeding portions without recording signals | ||||
| FA21 | FA22 | FA23 | FA24 | FA26 | FA28 | FA30 | ||||||
| . . . Switching of muting portions to specific signals | . . . Muting at switching between recording and reproducing | . . . Muting at switching of travelling modes | . . . Muting at switching of tracks | . Protection against howling | . Protection against crosstalk | . Elimination of distortion between multiplexed signals or non-linear distortion | ||||||
| FA31 | FA32 | FA33 | FA34 | FA35 | FA37 | FA39 | FA40 | |||||
| . Correction of fluctuation on time axis | . . Detection of fluctuation on time axis | . . . Recording of reference signals detecting fluctuation on time axis | . . . Modulation of control signals detecting fluctuation on time axis | . . . Conversion and recording of frequency band in correcting for fluctuation on time axis | . Compensation for drop-out | . Reproducing by pitch conversion | . . Pitch conversion circuits | |||||
| FA41 | FA42 | FA43 | FA45 | FA46 | FA47 | FA48 | ||||||
| . . Rotary heads for performing pitch conversion | . . Pitch conversion reproducing interlocked with velocity switching | . . Pitch conversion in inverse running mode | . Repeated reproducing | . . Repeated reproducing with endless tape | . . Repeated reproducing with solid memory | . . Repeated reproducing with rotary disks | ||||||
| FA51 | FA52 | FA53 | FA54 | FA55 | FA60 | |||||||
| . Parallel reproducing in signal processing | . . Parallel reproducing with a plurality of heads | . . . Parallel reproducing on both sides | . . Parallel reproducing between a plurality of media | . . Parallel reproducing by single head | . Other technology for reproducing system signal processing | |||||||
| GA | GA00 SIGNAL PROCESSING IN RECORDING AND REPRODUCING SYSTEMS |
GA01 | GA02 | GA03 | GA04 | GA05 | GA06 | GA07 | GA08 | GA09 | GA10 | |
| . Compression and elongation signal processing | . . Compression and elongation circuits for signal processing | . . Compression and elongation by a plurality of means for compression and elongation signal processing | . . . Compression and elongation provided by a plurality of compression and elongation circuits | . . . Recording of compression and elongation reference signals | . . . Modulation of control signals with compression and elongation reference signals | . . Compression and elongation of information levels | . . . Compression and elongation of reference signals together with information signals | . . . AGC circuits for signal processing | . . . Controlling of MPX filters | |||
| GA11 | GA12 | GA13 | GA14 | GA15 | GA16 | GA18 | GA20 | |||||
| . . . Switching between compression and elongation of levels | . . . . Switching between compression and elongation of levels at high speed mode | . . . . Switching between compression and elongation of levels at switching of travelling mode | . . . . Switching between compression and elongation of levels at turning on of power supply | . . . . Switching between compression and elongation circuits for levels in dubbing | . . Compression and elongation of time axis of information signals | . Voice multiplexing | . Cipher or secret recording | |||||
| GA21 | GA22 | GA23 | GA25 | GA26 | GA28 | GA30 | ||||||
| . Recording of signals by dividing | . . Dividing of signals on frequency axis | . . Dividing of signals on time axis | . Recording of more than one kind of signals by superimposing | . . Superimposing of brightness and color signals | . Automatic switching | . Other technology for signal processing in recording and reproducing systems | ||||||
| HA | HA00 SIGNAL PROCESSING IN OUTPUT CIRCUIT SYSTEMS |
HA01 | HA02 | HA03 | HA04 | HA05 | HA07 | HA08 | HA09 | HA10 | ||
| . Mixing | . . Mixing circuits | . . Wireless mixing | . . Switching of mixing | . . Adjustment of mixing levels | . Karaoke (i.e., sing-along machine) | . . Addition of echo for Karaoke | . . Video Karaoke | . . . Adding video effects for Karaoke | ||||
| HA11 | HA12 | HA13 | HA14 | HA16 | HA17 | HA18 | HA20 | |||||
| . . Reproducing of accompaniment and vocal tones for Karaoke | . . . Removal of vocal signals for Karaoke | . . . Delayed reproduction of accompaniment tones for Karaoke | . . . Adding of sound effects for Karaoke | . Adjustment of sound quality | . Output circuit system signal processing in connection with RF circuits | . Output circuit system signal processing in connection with communications systems | . Other technology for signal processing in output circuit systems | |||||
| JA | JA00 OTHER SIGNAL PROCESSING CONFIGURATIONS IN RECORDING AND REPRODUCING SYSTEMS |
JA01 | JA02 | JA03 | JA04 | JA05 | JA06 | JA07 | JA08 | JA09 | JA10 | |
| . Timer recording | . Connections between head and recording and reproducing systems | . Testing, inspection and measuring | . Processing of defective tracks | . Configuration of recording and reproducing devices and other kinds of devices | . . Configuration of recording and reproducing devices and video cameras | . . Connection of recording and reproducing devices to adaptor circuits | . . Control of recording and reproducing devices by computer | . Indications and instructions | . Other signal processing configurations |