Data Processing: Speech Signal Processing, Linguistics, Language Translation, And Audio Compression/decompression Patents (Class 704)
- Assessment or evaluation of speech recognition systems (EPO) (Class 704/E15.002)
- Language recognition (EPO) (Class 704/E15.003)
- Feature extraction for speech recognition; selection of recognition unit (EPO) (Class 704/E15.004)
- Segmentation or word limit detection (EPO) (Class 704/E15.005)
- Creation of reference templates; training of speech recognition systems, e.g., adaption to the characteristics of the speaker's voice, etc. (EPO) (Class 704/E15.007)
- Speech classification or search (EPO) (Class 704/E15.014)
- Speech recognition techniques for robustness in adverse environments, e.g., in noise, of stress induced speech, etc. (EPO) (Class 704/E15.039)
- Procedures used during a speech recognition process, e.g., man-machine dialogue, etc. (EPO) (Class 704/E15.04)
- Speech recognition using nonacoustical features, e.g., position of the lips, etc. (EPO) (Class 704/E15.041)
- Speech to text systems (EPO) (Class 704/E15.043)
- Constructional details of speech recognition systems (EPO) (Class 704/E15.046)
- Perceptual measures for quality assessment (EPO) (Class 704/E19.002)
- Correction of errors induced by the transmission channel, if related to the coding (EPO) (Class 704/E19.003)
- Lossless audio signal coding; perfect reconstruction of coded audio signal by transmission of coding error (EPO) (Class 704/E19.004)
- Multichannel audio signal coding and decoding, i.e., using interchannel correlation to reduce redundancies, e.g., joint-stereo, intensity-coding, matrixing, etc. (EPO) (Class 704/E19.005)
- Comfort noise, silence coding (EPO) (Class 704/E19.006)
- Speech coding using phonetic or linguistical decoding of the source; reconstruction using text-to-speech synthesis (EPO) (Class 704/E19.007)
- Systems using vocoders (EPO) (Class 704/E19.008)
- Audio watermarking, i.e., embedding inaudible data in the audio signal (EPO) (Class 704/E19.009)
- Using spectral analysis, e.g., transform vocoders, subband vocoders, perceptual audio coders, psychoacoustically based lossy encoding, etc., e.g., MPEG audio, Dolby AC-3, etc. (EPO) (Class 704/E19.01)
- Dynamic bit allocation (EPO) (Class 704/E19.022)
- Using predictive techniques; codecs based on source-filter modelization (EPO) (Class 704/E19.023)
- Speech enhancement, e.g., noise reduction, echo cancellation, etc. (EPO) (Class 704/E21.002)
- Time compression or expansion (EPO) (Class 704/E21.017)
- Transformation of speech into a nonaudible representation, e.g., speech visualization, speech processing for tactile aids, etc. (EPO) (Class 704/E21.019)
- Methods for producing synthetic speech; speech synthesizers (EPO) (Class 704/E13.002)
- Details of speech synthesis systems, e.g., synthesizer architecture, memory management, etc. (EPO) (Class 704/E13.005)
- Elementary speech units used in speech synthesizers; concatenation rules (EPO) (Class 704/E13.009)
- Text analysis, generation of parameters for speech synthesis out of text, e.g., grapheme to phoneme translation, prosody generation, stress, or intonation determination, etc. (EPO) (Class 704/E13.011)
