Siemens Aktiengesellschaft

Werner Liegl

Hans-Joachim Grallert

Hans Brandl

Udo Reimann

A method and apparatus for improving picture quality in multi-dimensional differential pulse code modulation coding wherein at the receiver at the end of an active picture line AZ reconstructed samples C.sub.r are expanded by utilizing auxiliary samples H.sub.c which are allocated to the blanking interval AL and the same auxiliary samples H.sub.c are utilized for encoding at the transmitter of the data. The method and apparatus substantially improves the picture quality by utilizing the techniques of the invention.

Method and apparatus for improving the picture quality in

A circuit for electronically synthesizing speech has an audio generator for representing voiced sounds and a noise generator for representing voiceless sounds and a means for selecting significant parameters of the various speech elements by sampling and a means for storing those parameters. The circuit also includes a filter unit comprised of a number of individual filters and a means for selectively driving only those individual filters having filter coefficients necessary for representing the significant parameters of the particular speech element to be synthesized. The filters can be utilized individually or combined into selected groups in order to generate longer speech segments. The electronic signal at the output of the filter unit is edited for acoustically reproducing the desired speech elements and segments.

Circuit for electronic speech synthesis

An arrangement for transmission of television composite signals contains coders which convert luminance component Y, and chrominance difference components U, and V of a television signal into variable-length code words. These are interlaced in a multiplexer in pulse frames by assignment to fixed locations. At a receive side, a time-division multiplex signal formed is in turn separated in a demultiplexer. Decoders reconvert the variable-length code words into the Y, U, and V components. The luminance and chrominance components can be reliably separated at the receive side due to the assigning of fixed locations in the pulse frame, these components being reliable separated even when the word synchronization of the individual components is lost.

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Schwabhausen, Germany

Werner Liegl