A compressed-code generating method that is used for compressing information on characters including numerical data, sound and images, and a compressed-code expanding method that is used for restoring and expanding the compressed code generated by using the compressed-code generating method to the original information. Bit strings {y}.sub.1 and {y}.sub.2 are obtained respectively from a bit string {y} of information to be compressed. A reversible loop that exists in chaos is operated to these ob...

A method for generating candidate word strings in speech recognition is provided, which is based on the nodes in the word lattice to search candidate word strings. The associated maximum string score for each node is first determined. Next, all nodes are sorted based on the associated maximum string score to group the nodes with the same string score into the same node set. Then, the node sets with relative high string scores are selected to connect the nodes by their starting time frame and end...

The present invention provides a method and system to improve the cookbook search algorithm used in a coding/decoding device or routine. The codebook search algorithm is performed by a processing system that allows for parallel execution of instructions, for example a DSP. An embodiment of the present invention provides a method for coding of a first waveform. First a plurality of vectors determined from a plurality of waveforms is stored in a memory. Next a minimum weighted error using a plural...

A method of optimizing audio input for speech recognition applications can include identifying a source waveform and at least one optimization parameter, wherein the optimization parameter is configured to adjust audio input to a speech recognition application. The source waveform can be modified according to the optimization parameter resulting in a modified waveform. At least one optimization parameter can be synchronized with the source waveform. At least two time dependant graphs can be disp...

The present invention relates to a speech recognition apparatus and a speech recognition method for speech recognition with improved accuracy. A distance calculator 47 determines the distance from a microphone 21 to a user uttering. Data indicating the determined distance is supplied to a speech recognition unit 41B. The speech recognition unit 41B has plural sets of acoustic models produced from speech data obtained by capturing speeches uttered at various distances. From those sets of acoustic...

A coding parameter control circuit 31 computes a frame length from a bit rate and coding delay, and provides the computed frame length data to a CELP coding circuit 32. Based on the computed frame length, the coding parameter control circuit 32 selects control parameters from a table, in which a plurality of control parameters for controlling the operation of the CELP coding circuit are stored, and provides the selected control parameters to the CELP coding circuit. The coding parameter control ...

The present invention relates to a system and method for automatically verifying that a message received from a user is intelligible. In an exemplary embodiment, a message is received from the user. A speech level of the user's message may be measured and compared to a pre-determined speech level threshold to determine whether the measured speech level is below the pre-determined speech level threshold. A signal-to-noise ratio of the user's message may be measured and compared to a pre-determine...

Methods and apparatus for document based ambiguous character resolution. An application searches a document for words that do not contain ambiguous characters and adds them to a dictionary, then searches the document for words that do contain ambiguous characters. For each ambiguous word, a set of candidate solutions is created by resolving the ambiguous characters in all possible ways. The dictionary is searched for words matching members of the candidate solution set. When a single member is m...

A natural (e.g., handwriting or speech) input recognition system and method that uses contextual mapping to improve recognition accuracy by biasing recognition based on the context of an input field. As natural input data is being entered into an application field, the context (type) of the field is determined and used to locate context-based validation rules and context-based user bias data. When entry is complete, the context-based validation rules and context-based user bias data are provided...

The invention makes it possible to avoid an increase in the number of confirmation sentences and response sentences output to the user which gives dissatisfaction for the user by the increase that occur due to recognition errors. The present invention provides a device for determining the content of the request input by the user and the information types that can be provided to the user; a device for generating a dialogue sequence that includes confirmation for the user for each information type...