Programmable device for storing digital video lines
AssigneeSTMicroelectronics S.r.l.
InventorsFabrizio Airoldi, Franco Cavallotti, Alessandro Cremonesi, Gian G. Rizzotto
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Abstract
A programmable device for storing digital video lines, being of a type intended for use in TV sets with digital frame scan features whereby a video line is sample coded in a digital signal, comprises at least one pair of memories each adapted to contain the code of one video line, and a bank of registers connected in series to one another and to each of the memories, at least one of the registers being fed, at its input terminals, with the digital signal to parallel the samples to be input to the memories.
Claims24
A programmable device for storing digital video lines, the device being of a type intended for use in digital frame scan TV set wherein a video line is sample encoded in a digital signal to provide code samples, comprising at least one pair of memories, each adapted to contain code corresponding to one video line, a bank of registers connected in series with one another and also connected to each of said memories, at least one of said registers receiving on its input said digital signal for paralleling said samples for application to said memories, a control circuit having outputs connected to each of said memories for selecting different operation modes for storing said code samples, and an additional register connected downstream from said bank of registers and having an output at which the code of a video line sample preceding the video line which is going to be stored is output.
A programmable device for storing digital video lines, wherein a video line is sample encoded in a digital signal including code samples, the device comprising:
- at least one pair of memories, each adapted to store the code samples corresponding to one video line;
- a bank of registers connected in series with one another and also connected to each of said memories, at least one of said registers receiving on its input said digital signal for paralleling said code samples for application to said memories;
- and
- an additional register connected downstream from said bank of registers and having an output at which a code sample of a video line preceding the video line stored in the at least one pair of memories is output.
A programmable device for storing digital video lines, the device being of a type used in digital frame scan TV sets wherein a video line is sample encoded in a digital signal including code samples, the device comprising:
- at least one pair of memories, each adapted to contain the code samples corresponding to one video line;
- a bank of registers connected in series with one another and also connected to each of said memories, at least one of said registers receiving on its input said digital signal for paralleling said code samples for application to said memories;
- and
- an additional register connected downstream from said bank of registers and having an output at which a code sample of a video line preceding the
- video line stored in the pair of memories is output.
A method of storing digital video lines, wherein a video line is sample encoded in a digital signal including a serial sequence of code samples, comprising the steps of:
- storing in at least one pair of memories, the code samples corresponding to one video line;
- paralleling said serial sequence of code samples prior to storing in said memories;
- and
- providing simultaneous with the step of paralleling, an output including a code sample of a video line preceding the video line which is stored.
A programmable device for storing digital video lines, wherein a video line is sample encoded in a digital signal including code samples, the device comprising:
- a memory in which are stored the code samples corresponding to a plurality of video lines;
- a plurality of code sample registers connected in series, each register having an output, the outputs connected to the memory in parallel, whereby the video line is stored therein;
- and
- an additional register connected to receive an output of a last of the plurality of code sample registers and having an output carrying a code
- sample of a preceding video line.
A programmable device for storing digital video lines, wherein a video line is sample encoded in a digital signal including code samples, the device comprising:
- means for storing the code samples corresponding to a plurality of video lines having a parallel input and an output;
- means connected to receive the digital signal as a sequence of the code samples, for converting the digital signal to a parallel format digital signal corresponding to the video line, the parallel format digital signal provided at a parallel output connected to the parallel input of the means for storing;
- and
- means connected to the parallel output and having a code sample output for providing a code sample from a preceding video line.
Dependencies are inferred from the claim text.