| Class 375 | PULSE OR DIGITAL COMMUNICATIONS |
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![[List of Pre Grant Publications for class 375 subclass 130]](../as.gif) | ![[List of Patents for class 375 subclass 130]](../ps.gif) | 130 | SPREAD SPECTRUM |
| | 131 |  Hybrid form |
| | 132 | Frequency hopping |
| | 138 | Time hopping |
| | 139 | Chirp |
| | 140 | Direct sequence |
| | 211 | REPEATERS |
| | 216 | APPARATUS CONVERTIBLE TO ANALOG |
| | 218 | EARTH OR WATER MEDIUM |
| | 219 | TRANSCEIVERS |
| | 220 | Transmission interface between two stations or terminals |
| | 221 | Loopback mode |
| | 222 | Modems (data sets) |
| | 224 | TESTING |
| | 229 | EQUALIZERS |
| | 237 | PULSE NUMBER MODULATION |
| | 238 | PULSE WIDTH MODULATION |
| | 239 | PULSE POSITION, FREQUENCY, OR SPACING MODULATION |
| | 240 | BANDWIDTH REDUCTION OR EXPANSION |
| | 240.01 | Television or motion video signal |
| | 240.02 |  Adaptive |
| | 240.08 | Feature based |
| | 240.12 | Predictive |
| | 240.18 | Transform |
| | 240.21 | Subsampling |
| | 240.22 | Vector quantization |
| | 240.23 | Variable length coding |
| | 240.24 | Block coding |
| | 240.25 | Specific decompression process |
| | 240.26 | Associated signal processing |
| | 241 | Pulse code modulation |
| | 242 | PULSE CODE MODULATION |
| | 243 | Correcting or reducing quantizing errors |
| | 244 | Differential |
| | 253 | Length coding |
| | 254 | Noise or distortion reduction |
| | 256 | PULSE TRANSMISSION VIA RADIATED BASEBAND |
| | 257 | CABLE SYSTEMS AND COMPONENTS |
| | 259 | SYSTEMS USING ALTERNATING OR PULSATING CURRENT |
| | 260 | Plural channels for transmission of a single pulse train |
| | 261 | Quadrature amplitude modulation |
| | 262 |  Maximum likelihood decoder or viterbi decoder |
| | 263 | Partial response |
| | 264 | Multilevel |
| | 265 | Trellis encoder or Trellis decoder |
| | 267 | Diversity |
| | 268 | Amplitude modulation |
| | 271 | Angle modulation |
| | 272 | Frequency shift keying |
| | 273 | Combined with phase shift keying |
| | 274 | Minimum shift keying |
| | 275 | More than two frequencies |
| | 276 | One cycle or less per bit |
| | 277 | Vestigial or single sideband, or suppressed carrier |
| | 278 | Antinoise or distortion |
| | 279 | Phase shift keying |
| | 285 | Antinoise or distortion |
| | 286 | MULTILEVEL |
| | 287 | With threshold level |
| | 288 | Transmission line |
| | 289 | Bipolar signal |
| | 290 | Partial response |
| | 292 | Disparity reduction |
| | 293 | Synchronized |
| | 295 | TRANSMITTERS |
| | 296 | Antinoise or distortion (includes predistortion) |
| | 298 | Quadrature amplitude modulation |
| | 299 | Plural diversity |
| | 300 | Amplitude modulation |
| | 302 | Angle modulation |
| | 303 | Frequency shift keying |
| | 304 | Antenna tuning with frequency shift |
| | 305 | Minimum shift keying |
| | 306 | One oscillator |
| | 307 | Two or more oscillators |
| | 308 | Phase shift keying |
| | 309 | Keying circuits |
| | 316 | RECEIVERS |
| | 317 | Automatic baseline or threshold adjustment |
| | 320 | Amplitude modulation |
| | 322 | Angle modulation |
| | 323 | Combined phase shift keyed and frequency shift keyed |
| | 324 | Particular demodulator |
| | 325 | Including coherent detector |
| | 326 | Carrier recovery circuit or carrier tracking |
| | 327 | Phase locked loop |
| | 328 | Including switching or gating (digital circuits) |
| | 329 | Phase shift keying |
| | 334 | Frequency shift keying |
| | 338 | Interrupted carrier wave |
| | 340 | Particular pulse demodulator or detector |
| | 341 | Maximum likelihood decoder or viterbi decoder |
| | 342 | Locating predetermined portion of pulse |
| | 343 | Correlative or matched filter |
| | 344 | Automatic frequency control |
| | 345 | Automatic gain control |
| | 346 | Interference or noise reduction |
| | 347 | Diversity (frequency or time) |
| | 348 | Intersymbol interference |
| | 349 | Plural signal paths in receiver |
| | 350 | By filtering (e.g., digital) |
| | 351 | Gating, blanking, etc. |
| | 352 | With electromagnetic relay or solenoid |
| | 353 | PULSE AMPLITUDE MODULATION |
| | 354 | SYNCHRONIZERS |
| | 355 | Synchronizing the sampling time of digital data |
| | 356 | Network synchronizing more than two stations |
| | 357 | Synchronization failure prevention |
| | 358 | Feedback, receiver to transmitter |
| | 359 | Self-synchronizing signal (self-clocking codes, etc.) |
| | 362 | Frequency or phase control using synchronizing signal |
| | 363 | Synchronization bit insertion into artificially created gaps |
| | 364 | Synchronization signals with unique amplitude, polarity, length, or frequency |
| | 365 | Synchronization word |
| | 369 | Start - stop |
| | 371 | Phase displacement, slip or jitter correction |
| | 377 | MISCELLANEOUS |
| E-SUBCLASSES | ||
| The following subclasses beginning with the letter E are E-subclasses. Each E-subclass corresponds in scope to a classification in a foreign classification system, for example, the European Classification system (ECLA). The foreign classification equivalent to an E-subclass is identified in the subclass definition. In addition to US documents classified in E-subclasses by US examiners, documents are regularly classified in E-subclasses according to the classification practices of any foreign Offices identified in parentheses at the end of the title. For example, "(EPO)" at the end of a title indicates both European and US patent documents, as classified by the EPO, are regularly added to the subclass. E-subclasses may contain subject matter outside the scope of this class.Consult their definitions, or the documents themselves to clarify or interpret titles. |
| | E1.001 | SPREAD SPECTRUM TECHNIQUES IN GENERAL (EPO) |
| | E1.002 | Using direct sequence modulation (EPO) |
| | E1.003 | With code acquisition (EPO) |
| | E1.004 | Setting of lock conditions, e.g., threshold (EPO) |
| | E1.005 | Code identification (EPO) |
| | E1.006 | Multimode search, i.e., using multiple search strategies (EPO) |
| | E1.007 | Using partial detection (EPO) |
| | E1.01 | Multistage acquisition (EPO) |
| | E1.013 | Setting of search window, i.e., range of code offsets to be searched (EPO) |
| | E1.014 | Masking/slewing, i.e., jumping within the code (EPO) |
| | E1.015 | With increased resolution, i.e., higher than half a chip (EPO) |
| | E1.016 | Using a code tracking loop, e.g., a delay locked loop (EPO) |
| | E1.017 | With demodulation by means of convolvers, e.g., of the SAW type (EPO) |
| | E1.018 | With demodulation by means of matched filters (EPO) |
| | E1.019 | With asynchronous demodulation, i.e., not requiring code synchronisation (EPO) |
| | E1.02 | Interference-related aspects (EPO) |
| | E1.021 | The interference being narrowband (EPO) |
| | E1.024 | The interference being multiple access interference (EPO) |
| | E1.025 |  Using joint detection techniques, e.g., linear detectors (EPO) |
| | E1.026 |  Using decorrelation matrix (EPO) |
| | E1.027 | Using minimum mean squared error (MMSE) detector (EPO) |
| | E1.028 | Using maximum-likelihood sequence estimation (MLSE) (EPO) |
| | E1.029 | Using subtractive interference cancellation (EPO) |
| | E1.032 | The interference being multi path interference, e.g., RAKE receivers (EPO) |
| | E1.033 | Using frequency hopping (EPO) |
| | E7.001 | SYSTEMS FOR THE TRANSMISSION OF TELEVISION SIGNALS USING PULSE CODE MODULATION (EPO) |
| | E7.002 | Arrangements for interfacing to the transmission channel or to the communication network (EPO) |
| | E7.003 | Bitstream control arrangements (EPO) |
| | E7.004 | Involving pointers to the video stream (EPO) |
| | E7.005 | Involving the control of media objects (EPO) |
| | E7.006 | Presentation therefor, e.g., on the basis of a scene description (EPO) |
| | E7.007 | User interaction therefor (EPO) |
| | E7.009 | Intellectual Property Rights management and protection therefor (EPO) |
| | E7.01 | Synchronization therefor, e.g., synchronization of elementary stream objects at the sync layer with time stamps (EPO) |
| | E7.011 | Involving control of the complexity properties of the video bitstream, e.g., spatial or temporal resolution, SNR, bit rate, region of interest selection (EPO) |
| | E7.012 | Where the control is performed by the receiver of the video, e.g., active selection by the receiver from a scalable bitstream or selective multicast subscription (EPO) |
| | E7.013 | Where the control is performed by the transmitter of the video, e.g., active selection by the transmitter of parts of scalable bitstream to be sent (EPO) |
| | E7.014 | Involving buffer level management (EPO) |
| | E7.015 | Involving a control signal to the decoder, e.g., from the medium specific interface unit, or from the network (EPO) |
| | E7.016 | Involving a control signal to the encoder, e.g., from the medium specific interface unit, or from the network (EPO) |
| | E7.017 | Involving an exchange of control commands (EPO) |
| | E7.018 | Bitstream embedding arrangements, e.g. arrangements for blending, replacing, hiding, compositing or associating at bitstream level (EPO) |
| | E7.019 | Bitstream network arrangements (EPO) |
| | E7.02 | Bitstream transport arrangements (EPO) |
| | E7.021 | Bitstream processing (EPO) |
| | E7.022 | Involving modification of bitstream parameters, e.g., restamping of time stamps, remapping of identifiers transmultiplexing (EPO) |
| | E7.023 | Involving switching between bitstreams (EPO) |
| | E7.024 | Involving transporting of additional information over the bitstream (EPO) |
| | E7.025 | Involving transporting of the bitstream over a delivery medium (EPO) |
| | E7.026 | Using bandwidth reduction ; source coding or decoding of digital video signal, e.g., digital video signal compression; Pre- or postprocessing therefor (EPO) |
| | E7.027 | Decoder-specific arrangements (EPO) |
| | E7.029 | Involving sub-band coding (EPO) |
| | E7.03 | In combination with temporal predictive coding, e.g., in 'inter' mode (EPO) |
| | E7.031 | With motion compensated temporal filtering (EPO) |
| | E7.032 | With at least one adaptive element (EPO) |
| | E7.033 | Involving variable length or entropy coding, e.g., Huffmann or arithmetic coding (EPO) |
| | E7.034 | Involving normalization or quantizing (EPO) |
| | E7.035 | Involving a bit-rate or bit-amount target (EPO) |
| | E7.037 | With interframe prediction not only of coefficient values (EPO) |
| | E7.038 | Suited to an interframe bitstream syntax (EPO) |
| | E7.039 | Using sub-band domain temporal integration (EPO) |
| | E7.04 | Of a single image (EPO) |
| | E7.041 | In more than two frequency dimensions (EPO) |
| | E7.042 | Of arbitrarily shaped image segments (EPO) |
| | E7.043 | With details relating to the sub-band filter (EPO) |
| | E7.046 | With at least one adaptive element (EPO) |
| | E7.047 | Involving variable length or entropy coding, e.g., Huffmann or arithmetic coding (EPO) |
| | E7.048 | Involving normalization or quantizing (EPO) |
| | E7.049 | Involving a bit-rate or bit-amount target (EPO) |
| | E7.051 | Control aspects therefor (EPO) |
| | E7.052 | Controlled element (EPO) |
| | E7.053 |  Subband structure, e.g., number of subbands (EPO) |
| | E7.054 | Filter type or filtering coefficients (EPO) |
| | E7.055 | Error protection, detection or correction (EPO) |
| | E7.056 | Scan or transmission order of coefficients or bitplanes (EPO) |
| | E7.058 | Unit of control (EPO) |
| | E7.059 | Relating to sub-band structure (EPO) |
| | E7.06 |  Hierarchical level (EPO) |
| | E7.061 | Directional tree, e.g., low-high (LH), high-low (HL), high-high (HH) (EPO) |
| | E7.062 | Object or region (EPO) |
| | E7.063 | Element used for control (EPO) |
| | E7.066 | With prediction other than mere runlength (EPO) |
| | E7.069 | Involving the arranging of coefficients or bits, e.g., for scalability or progressive transmission (EPO) |
| | E7.07 | Involving scan according to levels, e.g., breath-first (EPO) |
| | E7.071 | Involving scan according to trees, e.g., depth-first (EPO) |
| | E7.072 | Coding of bitplanes or significance, e.g., zero tree (EPO) |
| | E7.073 | Involving error protection, detection or correction (EPO) |
| | E7.074 | Suited to a bitstream syntax (EPO) |
| | E7.075 | With grouping into blocks (EPO) |
| | E7.076 | Involving video objects (EPO) |
| | E7.077 | Involving both synthetic and natural picture components, e.g., synthetic natural hybrid coding (SNHC) (EPO) |
| | E7.078 | Scalability, e.g., involving base and at least one enhancement video object layers (VOL) (EPO) |
| | E7.081 | Shape coding therefor (EPO) |
| | E7.083 | Model based coding therefor (EPO) |
| | E7.085 | Coding of regions that are present throughout a whole video segment, e.g., sprites (EPO) |
| | E7.087 | Scene description coding, e.g., binary format for scenes (BIFS) compression (EPO) |
| | E7.088 | Involving coding of different picture or data components (EPO) |
| | E7.089 | Involving the insertion of extra data, e.g., in the video data, in the coding parameters or by modification of said video data or parameters (EPO) |
| | E7.09 | Involving separate coding of the error signal, i.e., the difference between the original picture and the locally reconstructed one (EPO) |
| | E7.091 | Involving arrangements for adaptive allocation of coded information to different channels (EPO) |
| | E7.092 | Involving multi-layer decomposition; subsequent reconstruction (EPO) |
| | E7.093 | Implementation arrangements, e.g., implementation by hardware of software (EPO) |
| | E7.094 | Memory arrangements (EPO) |
| | E7.1 | Motion estimation and/or compensation hardware (EPO) |
| | E7.103 | Parallel arrangements (EPO) |
| | E7.104 | Motion estimation therefor; processing of motion vectors for bandwidth reduction purposes (EPO) |
| | E7.105 | Methods (EPO) |
| | E7.106 | Global motion vector estimation (EPO) |
| | E7.107 | Multiresolution or hierarchical method (EPO) |
| | E7.108 | Multistep search method, e.g., 3-step, 2D-log, One-at-a-Time Search (OTS) (EPO) |
| | E7.109 | Nonblock-based processing (EPO) |
| | E7.113 | Sub-pixel accuracy (EPO) |
| | E7.114 | Transform domain motion estimation (EPO) |
| | E7.115 | Details (EPO) |
| | E7.116 | Spatially constrained motion estimation, e.g., at image or region borders (EPO) |
| | E7.117 | Dealing with occlusions (EPO) |
| | E7.118 | Early exit, i.e., stopping a systematic computation based on a certain criteria, e.g., error magnitude is too large (EPO) |
| | E7.119 | Search initialization, i.e., estimating a good candidate to initiate a search (EPO) |
| | E7.12 | Padding, i.e., filling nonobject values in an arbitrary shaped block for motion estimation purposes (EPO) |
| | E7.121 | Rate-distortion criteria (EPO) |
| | E7.122 | Variable search window size or shape (EPO) |
| | E7.123 | Processing of motion vectors (EPO) |
| | E7.126 | Adaptive or control aspects therefor (EPO) |
| | E7.127 | Methods, elements or tools for adaptive control (EPO) |
| | E7.132 | Controlled element or parameter (EPO) |
| | E7.133 | Predictor (EPO) |
| | E7.134 | Target code amount (EPO) |
| | E7.135 | Filtering, e.g., for pre- or post-processing (EPO) |
| | E7.136 | Grid, i.e., regular pattern of elementary coding units in a picture, e.g., block grid (EPO) |
| | E7.137 | Encoder, i.e., selection among a plurality of heterogeneous encoders (EPO) |
| | E7.138 | Encoding parameters processing, e.g., initialization, alteration, compression (EPO) |
| | E7.139 | Quantizer (EPO) |
| | E7.14 | Details of quantization, normalization or weighting functions, e.g., normalization parameters or matrices, variable uniform quantizes, weighting matrices (EPO) |
| | E7.141 | Resource allocation (EPO) |
| | E7.142 | Transform coefficients scan, e.g., zig-zag scan (EPO) |
| | E7.143 | Transformer, e.g., 8x8 or 2x4x8 DCT, selection among a plurality of different transform operations (EPO) |
| | E7.144 | Variable length coding (VLC) or entropy coding, e.g., Huffmann or arithmetic coding (EPO) |
| | E7.145 | Skipping or zeroing of coding units, e.g., adaptive decimation, frame skipping, transform coefficient masking (EPO) |
| | E7.146 | Coding or prediction mode selection (EPO) |
| | E7.147 | Intra coding, e.g., selection among a plurality of spatially predictive coding modes (EPO) |
| | E7.148 | Refresh, i.e., intra-coding mode decision, e.g., at macroblock or picture level (EPO) |
| | E7.149 | Inter coding, i.e., selection among a plurality of temporally predictive coding modes (EPO) |
| | E7.15 | Picture structure, e.g., interlaced/progressive (EPO) |
| | E7.151 | Group-of-pictures (GOP) structure (EPO) |
| | E7.152 | Controlling element, parameter or criteria (EPO) |
| | E7.153 | Rate distortion criteria (EPO) |
| | E7.154 | Data rate or code amount (EPO) |
| | E7.155 | Using a combination of feedforward and feedback control (EPO) |
| | E7.156 | Using feedforward control (EPO) |
| | E7.157 | Based on model-estimated code amount (EPO) |
| | E7.158 | Based on off-line generated code amount (EPO) |
| | E7.159 | Feedback control, i.e., control using output code amount, e.g., buffer fullness (EPO) |
| | E7.161 | Input video signal characteristics (EPO) |
| | E7.162 | Complexity, e.g., activity, edges (EPO) |
| | E7.163 | Motion, e.g., field or frame difference (EPO) |
| | E7.165 | Scene cut (EPO) |
| | E7.166 | Chrominance (EPO) |
| | E7.167 | Visual quality (EPO) |
| | E7.168 | Resource availability (EPO) |
| | E7.169 | Coding mode (EPO) |
| | E7.17 | Picture or macroblock type, e.g., I,P,B (EPO) |
| | E7.171 | Picture structure, e.g., interlaced/progressive (EPO) |
| | E7.172 | User input (EPO) |
| | E7.173 | Receiver or channel (EPO) |
| | E7.175 | Unit of control, i.e., structural or semantic portion of the video signal being the object of the control (EPO) |
| | E7.176 | Block or macroblock (EPO) |
| | E7.177 | Transform coefficient (EPO) |
| | E7.178 | Pixel (EPO) |
| | E7.179 | Group-of-pictures (GOP) (EPO) |
| | E7.18 | Slice, e.g., line of blocks, group of blocks (EPO) |
| | E7.181 | Picture (EPO) |
| | E7.182 | Image region, e.g., region of interest (ROI), object (EPO) |
| | E7.183 | Scene or shot (EPO) |
| | E7.184 | Bit (EPO) |
| | E7.185 | Chrominance (EPO) |
| | E7.186 | Layer (EPO) |
| | E7.187 | Compressed domain processing (EPO) |
| | E7.188 | Involving subsampling at the transmitter and restitution of the omitted samples by interpolation (EPO) |
| | E7.189 | Involving preprocessing or postprocessing therefor (EPO) |
| | E7.19 | Involving reduction of coding artifacts, e.g., of blockiness (EPO) |
| | E7.191 | Involving cinematographic video sequences, e.g., sequences originated from film and converted to video through 3:2 pulldown (EPO) |
| | E7.192 | Involving scene cut detection in conjunction with bandwidth reduction (EPO) |
| | E7.193 | Filtering (EPO) |
| | E7.195 | Standard related document (EPO) |
| | E7.196 | Normative references, e.g., working documents of standardization bodies like ISO/IEC, ITU-T, SMPTE in the domain of digital image and video coding (EPO) |
| | E7.197 | Illustrative references, e.g., overviews, reviews (EPO) |
| | E7.198 | Transcoding therefor, i.e., conversion of video data, coding parameters, syntax or the like in order to realize interoperability between different video coding standards (EPO) |
| | E7.199 | Syntax aspects, e.g., source coding bistream syntax (EPO) |
| | E7.209 | Using vector coding (EPO) |
| | E7.21 | Involving pulse code modulation and predictive coding (EPO) |
| | E7.211 | Involving transform and predictive coding , e.g., hybrid coding, Motion Picture Experts Group (MPEG) coding (EPO) |
| | E7.212 | Involving the use of at least one adaptive element (EPO) |
| | E7.213 | Involving variable length or entropy coding, e.g., Huffmann or arithmetic coding (EPO) |
| | E7.214 | Quantization, normalization or weighting techniques therefor, e.g., normalization parameters or matrices, variable uniform quantizers, weighting matrices (EPO) |
| | E7.215 | The output data rate being minimized down to or below the channel capacity (EPO) |
| | E7.216 | With feedback control only of the data rate, e.g., buffer fullness being used (EPO) |
| | E7.217 | With feedforward control only of the data rate, e.g., formation amount estimator or sorter being used (EPO) |
| | E7.218 | With feedforward and feedback control of the data rate (EPO) |
| | E7.219 | With iterative control of the data rate, e.g., multipass (EPO) |
| | E7.22 | Involving adaptive allocation of the frame type, e.g., adaptive group-of-pictures (GOP) structure (EPO) |
| | E7.221 | Motion adaptive (EPO) |
| | E7.222 | Multiplexing arrangements therefor, e.g., suited to a video bitstream syntax (EPO) |
| | E7.223 | Using nontransform coding for certain blocks (EPO) |
| | E7.224 | Forced updating therefor, e.g., refresh techniques, intra/inter-coding mode selection at macroblock or picture level (EPO) |
| | E7.225 | Using transform domain integration, i.e., the transform being operated outside the prediction loop (EPO) |
| | E7.226 | Involving transform coding, e.g., using discrete cosine transform (DCT) (EPO) |
| | E7.227 | Transforming in more than two dimensions (EPO) |
| | E7.228 | Of arbitrarily shaped image segments (EPO) |
| | E7.229 | Involving the use of at least one adaptive element, e.g., Joint Photographic Experts Group (JPEG) coding (EPO) |
| | E7.23 | Adaptive scanning order of DCT coefficients, e.g., alternate scanning (EPO) |
| | E7.231 | Involving variable length or entropy coding, e.g., Huffmann or arithmetic coding (EPO) |
| | E7.232 | Quantization, normalization or weighting techniques therefor, e.g., normalization parameters or matrices, variable uniform quantizes, weighting matrices (EPO) |
| | E7.233 | The output data rate being minimized down to or below the channel capacity (EPO) |
| | E7.234 | With feedback control only of the data rate, e.g., buffer fullness being used (EPO) |
| | E7.235 | With feedforward control only of the data rate, e.g., information amount estimator or sorter being used (EPO) |
| | E7.236 | With feedforward and feedback control of the data rate (EPO) |
| | E7.237 | With iterative control of the data rate (EPO) |
| | E7.238 | The output quality being above a minimum (EPO) |
| | E7.239 | Involving hierarchical transmission of the transform coefficients, e.g., progressive JPEG (EPO) |
| | E7.24 | Involving error detection or error correction (EPO) |
| | E7.241 | Involving pre-processing of the picture element samples before transform coding or post-processing of the same after transform decoding (EPO) |
| | E7.242 | Involving zonal sampling (EPO) |
| | E7.243 | Involving predictive coding (EPO) |
| | E7.244 | At least one coding element being controlled by the buffer fullness (EPO) |
| | E7.245 | With an adaptive quantizer characteristic, e.g., controlled by forward or backward adaptation (EPO) |
| | E7.246 | With error correction (EPO) |
| | E7.247 | Involving delta modulation (EPO) |
| | E7.248 | Using subsampling at the coder or sample restitution by interpolation at the coder or decoder (EPO) |
| | E7.249 | With adaptive prediction (EPO) |
| | E7.25 | With motion compensated interpolation, e.g., involving bidirectional frame interpolation, i.e., use of B-pictures (EPO) |
| | E7.252 | Involving spatial subsampling or upsampling; Alteration of picture size or resolution (EPO) |
| | E7.253 | Involving temporal subsampling, e.g., frame decimation (EPO) |
| | E7.255 | Using temporal prediction (EPO) |
| | E7.256 | Using motion compensation, e.g., by means of motion vectors (EPO) |
| | E7.257 | Long-term prediction (EPO) |
| | E7.258 | Block-based (EPO) |
| | E7.26 | With sub-pixel accuracy (EPO) |
| | E7.261 | Nonblock-based (EPO) |
| | E7.262 | Multiple frame prediction (EPO) |
| | E7.263 | Using motion detection, e.g., with detection of moving zones (EPO) |
| | E7.265 | Using spatial prediction (EPO) |
| | E7.2 | Specific techniques not provided for in other subgroups of E7.026 (EPO) |
| | E7.201 | Involving N-Tree coding, e.g., quadtree, octree (EPO) |
| | E7.202 | Involving run length coding (EPO) |
| | E7.203 | Involving matching pursuit (EPO) |
| | E7.204 | Involving fractal coding (EPO) |
| | E7.205 | Adaptive dynamic range coding (ADRC) (EPO) |
| | E7.206 | Involving both PCM encoding and DPCM encoding (EPO) |
| | E7.207 | Using a dither signal (EPO) |
| | E7.208 | Using noise or error feedback, e.g., quantization noise feedback (EPO) |
| | E7.267 | Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g., an audio signal, a synchronizing signal (EPO) |
| | E7.268 | Involving more than one video signal (EPO) |
| | E7.271 | Said other signal being a related audio signal (EPO) |
| | E7.272 | Said other signal being a private data stream, e.g., teletext, graphics (EPO) |
| | E7.273 | According to geometrical constraints of the communication medium, e.g., data formatting for subsequent transmission to a digital storage medium (EPO) |
| | E7.274 | Isochronously with the horizontal video sync, e.g., according to bit-parallel or bit-serial interface formats, as SMPTE 259M (EPO) |
| | E7.275 | The signals being synchronous (EPO) |
| | E7.277 | The signals being asynchronous (EPO) |
| | E7.279 | Systems for detection or correction of transmission errors (EPO) |
| FOREIGN ART COLLECTIONS | ||
| FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
| Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
| FOR100 | SPREAD SPECTRUM (375/200) |