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公开(公告)号：JPH07147646A
公开(公告)日：1995-06-06
申请号：JP12279994
申请日：1994-06-03
Applicant: ST MICROELECTRONICS SRL
Inventor： D ALTO VIVIANA , AIROLDI FABRIZIO , SCALISE FABIO , PODESTA MARIA GRAZIA
Abstract: PURPOSE: To suppress video signal echoes in a television equalizer. CONSTITUTION: A first digital filter 2 in television equalizer 1 supplies an output upon receiving a video signal x(k) and a first adding node 3 in the equalizer 1 supplies an equalizer output signal y(k) upon receiving the output of the filter 2. A digital filter 5 in the equalizer 1 supplies an output to the node 3 upon receiving the equalizer output signal y(k) and a second adding node in the equalizer 1 supplies an error signal e(k) which is equal to the difference between the equalizer output signal y(k) and a reference signal d(k). An echo suppressing circuit 4 supplies a filter coefficient updated upon receiving the error signal e(k) to the first and second digital filters 2 and 5.
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公开(公告)号：JPH07143455A
公开(公告)日：1995-06-02
申请号：JP13627294
申请日：1994-05-26
Applicant: ST MICROELECTRONICS SRL
Inventor： SCALISE FABIO , POLUZZI RINALDO
IPC: H04N7/015
Abstract: PURPOSE: To reduce the hardware silicon area of a video image decoder by reducing the amount of memory lines and, at the same time, to improve the modularity of the decoder. CONSTITUTION: A video image decoder incorporates channels (J and L), their corresponding processing blocks 13 and 14 and a demultiplexer 12 which receives TV signals from transmission channels (J and L) so as to individually process signals from the channels (J and L). A video image decoder for implementing a processing algorithm in a 40-ms mode on a high-resolution TV receiver of a type suitable for processing TV signals received on the corresponding transmission channels (J and L) and the signal processing method of the decoder can be obtained.
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Patent Agency Ranking
公开(公告)号：DE69329332T2
公开(公告)日：2001-02-22
申请号：DE69329332
申请日：1993-05-26
Applicant: ST MICROELECTRONICS SRL
Inventor： SCALISE FABIO , POLUZZI RINALDO
Abstract: A video image decoder architecture for implementing a processing algorithm in the 40-ms mode on high-resolution TV sets, of a kind adapted to handle TV signals being received on respective transmission channels (A,C), comprises: a video signal demultiplexer (12) being input said transmission channels (A,C); respective processing blocks (13,14) for separately handling the signals from each of the channels (A,C) and comprising, a video image format converter (15), a local memory (17) connected after the converter, and at least one median filter (25) and one systolic filter (27) cascade connected after said memory for restoring, by interpolation, signal samples related to successive lines of the video image;and a summing node (11) for adding together the outputs from each processing block (13,14) by obtaining a time mean between restored samples (Ai,Ci) of the channels (A,C). This architecture allows a drastic reduction in the number of memories required for processing the restore algorithm, as well as a reduction in overall silicon area for the system, and accordingly, the possibility of having the whole 40-millisecond processing portion integrated to a single chip.
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公开(公告)号：DE69327900D1
公开(公告)日：2000-03-30
申请号：DE69327900
申请日：1993-06-09
Applicant: ST MICROELECTRONICS SRL
Inventor： D ALTO VIVIANA , AIROLDI FABRIZIO , SCALISE FABIO , PODESTA MARIA GRAZIA
Abstract: An adaptive method for suppressing video signal x(k) echoes in equalizers of TV sets including digital filters whose coefficients are updated in an adaptive and iterative manner using an LMS (Least Mean Square) algorithm until the difference, or output error, between a target output signal d(k), called the reference signal, and an outgoing signal y(k) from the equalizer is gradually reduced, comprises the steps of: applying a "combing" technique to an original filter having K*N coefficients in order to select K comb filters having N coefficients each; applying said LMS algorithm, with a variable convergence factor ( mu ) to each individual comb filter for a predetermined number of iterations; gathering the resultant configurations of the comb filter coefficients and selecting a subfilter with N largest modulo coefficients therefrom; updating the values of said N coefficients again by reiterating the LMS algorithm to said subfilter for a limited number of iterations; zeroing all the coefficients with a lower modulo than a predetermined threshold; selecting a group of F coefficients by a slotting operation across those of said coefficients which have a cluster value: and updating the value of said group of F coefficients, by reiterating the LMS algorithm, until the output error e(k) becomes smaller than a predetermined value.
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公开(公告)号：DE69329332D1
公开(公告)日：2000-10-05
申请号：DE69329332
申请日：1993-05-26
Applicant: ST MICROELECTRONICS SRL
Inventor： SCALISE FABIO , POLUZZI RINALDO
Abstract: A video image decoder architecture for implementing a processing algorithm in the 40-ms mode on high-resolution TV sets, of a kind adapted to handle TV signals being received on respective transmission channels (A,C), comprises: a video signal demultiplexer (12) being input said transmission channels (A,C); respective processing blocks (13,14) for separately handling the signals from each of the channels (A,C) and comprising, a video image format converter (15), a local memory (17) connected after the converter, and at least one median filter (25) and one systolic filter (27) cascade connected after said memory for restoring, by interpolation, signal samples related to successive lines of the video image;and a summing node (11) for adding together the outputs from each processing block (13,14) by obtaining a time mean between restored samples (Ai,Ci) of the channels (A,C). This architecture allows a drastic reduction in the number of memories required for processing the restore algorithm, as well as a reduction in overall silicon area for the system, and accordingly, the possibility of having the whole 40-millisecond processing portion integrated to a single chip.
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公开(公告)号：DE60136611D1
公开(公告)日：2009-01-02
申请号：DE60136611
申请日：2001-05-10
Applicant: ST MICROELECTRONICS SRL
Inventor： FERRARI MARCO , SITI MASSIMILIANO , VALLE STEFANO , OSNATO FABIO , SCALISE FABIO
Abstract: A method is described for designing a new prunable S-random interleaver (I) class to be used as a constituent part of turbo codes (C1, C2). With respect to previously proposed solutions the method has the advantage of being prunable to different block sizes while exhibiting at the same time, for any considered block size, performance comparable with the optimized "ad hoc" S-random interleavers. Another advantage is that, as for every S-random interleaver, the design rules are independent of the constituent codes and of the puncturing rate applied to the turbo code. Therefore, these interleavers potentially can find applications in any turbo code scheme (C1, C2) that requires interleaver size flexibility and code rate versatility, thanks to the advantage of requiring a single law storage (i.e. one ROM storage instead of several ROMs) from which all the others are obtained by pruning, without compromising the overall error rate performance.
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公开(公告)号：DE69327900T2
公开(公告)日：2000-07-06
申请号：DE69327900
申请日：1993-06-09
Applicant: ST MICROELECTRONICS SRL
Inventor： D ALTO VIVIANA , AIROLDI FABRIZIO , SCALISE FABIO , PODESTA MARIA GRAZIA
Abstract: An adaptive method for suppressing video signal x(k) echoes in equalizers of TV sets including digital filters whose coefficients are updated in an adaptive and iterative manner using an LMS (Least Mean Square) algorithm until the difference, or output error, between a target output signal d(k), called the reference signal, and an outgoing signal y(k) from the equalizer is gradually reduced, comprises the steps of: applying a "combing" technique to an original filter having K*N coefficients in order to select K comb filters having N coefficients each; applying said LMS algorithm, with a variable convergence factor ( mu ) to each individual comb filter for a predetermined number of iterations; gathering the resultant configurations of the comb filter coefficients and selecting a subfilter with N largest modulo coefficients therefrom; updating the values of said N coefficients again by reiterating the LMS algorithm to said subfilter for a limited number of iterations; zeroing all the coefficients with a lower modulo than a predetermined threshold; selecting a group of F coefficients by a slotting operation across those of said coefficients which have a cluster value: and updating the value of said group of F coefficients, by reiterating the LMS algorithm, until the output error e(k) becomes smaller than a predetermined value.
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