Grundig Ag

Holger Carl

Dirk Kirchmann

The digital storage of speech signals in a semiconducting memory is known in the art. Large quantities of storage space are required for storing speech signals and therefore, for long recordings for example dictations, a very large semiconductor memory is needed. This is advantageously implemented using a so-called flash memory. However, the contents of such a memory can only be erased in large sections at a time so that minor changes such as partial erasures and insertions are not possible. The total available memory is subdivided into clusters and a table of contents is created in which the stored files and the state occupation of each cluster is stored, at is known in the art concerning the DOS file manager. Moreover, information which indicates which cluster is the next cluster of a file is stored for each cluster in a file allocation table. This process in accordance with the invention allows for erasures or insertions to be carried out by altering the indication in the file allocation table to the following cluster. In this manner, clusters may be both inserted into and removed from a file. In addition, information on each cluster includes the number of speech frames stored in the cluster and from which address the first speech frame is stored. It is thereby possible to logically remove individual speech frames, forming the smallest subdivision of the stored speech signal, from the file at the beginning or end of a cluster without having to execute an erasing process.

Process and circuit arrangement for storing dictations in a digital dictating machine

This invention relates to a method for voice signal coding and/or decoding. According to this method, a voice signal analysis for determining the prediction parameters is carried out from a digital voice signal. An excitation signal component (ENtp) is determined from an adaptive code book (,) built from a delayed integral excitation signal (Ev). Further, a multipulse component of the excitation signal is determined (,) by minimising the effect of the weighting filtered difference between the signal resulting from the respective excitation signal and the input voice signal.

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Fuerth, Germany

Holger Carl