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Papers by Pierre Siohan
Canadian Conference on Electrical and Computer Engineering, 2005.
The use of variable length codes (VLCs) is one of the key element in obtaining high compression r... more The use of variable length codes (VLCs) is one of the key element in obtaining high compression rates in source coding. However the transmission of VLCs also introduces a high risk of error propagation. In this context joint source-channel decoding can be an efficient alternative to the classical approach of separated source-channel decoding. Our paper illustrates this situation with the
The problem of conversion between different periodic sampling structures is of importance in a nu... more The problem of conversion between different periodic sampling structures is of importance in a number of applications related to multidimensional signal processing. For instance in areas of image processing, as multiresolution representations or high definition television, one has to modify sampling structures. For these types of processing finite impulse response (FIR) digital filters offer two main advantages, firstly a strictly linear phase, or a zero-phase, characteristic can be easily obtained, secondly they avoid the stability problem inherent to infinite impulse response (IIR) digital filters. In this paper, the design problem is stated for two-dimensional (2-D FIR) digital filters in the context of a transformation, defined by two integer parameters, which allows the conversion, in both directions, from an orthogonal to a quincunx sampling structure, which will be called (L,K) structure. The filter coefficients are obtained after a minimisation of the maximum error in the fr...
Sixth Multidimensional Signal Processing Workshop
Summary form only given. Two types of spatial sampling patterns, one with an orthogonal structure... more Summary form only given. Two types of spatial sampling patterns, one with an orthogonal structure and one having a quincunx structure, both related by two parameters, L and K, with integer values, have been investigated. The following results have been obtained: (1) the definition of a family of diamond-shaped filters having an ideal shape for an up- or down-sampling conversion with given parameters L and K; (2) the determination of a set of constraints in the frequency domain and their equivalent in the spatial domain for linear-phase 2D finite-impulse-response (FIR) digital filters; (3) the design of 2D FIR filters with specifications and constraints depending on the parameters L and K; (4) the presentation with a zone plane of the distortion introduced by the sampling pattern conversion for various values of L and K ; and (5) the cascading of two sampling pattern conversions in order to convert a (L1, K1) quincunx structure into a (L2, K2) quincunx structure
2012 International Symposium on Wireless Communication Systems (ISWCS), 2012
ABSTRACT
IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 1999
1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings
The problem of designing two-channel perfect reconstruction filter banks with odd length FIR line... more The problem of designing two-channel perfect reconstruction filter banks with odd length FIR linear phase analysis and synthesis filters is revisited. Based on an algebraic approach we introduce a complete and canonical lattice structure. Design examples show that, for short length filters, multiplierless realizations providing an acceptable frequency behaviour were attainable
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2016
2010 18th European Signal Processing Conference, Aug 1, 2010
2000 10th European Signal Processing Conference, Sep 1, 2000
2008 Ieee 19th International Symposium on Personal Indoor and Mobile Radio Communications, Sep 1, 2008
2008 Ieee International Conference on Communications, May 19, 2008
OFDM/OQAM is a special type of multi-carrier modulation that can be considered as an alternative ... more OFDM/OQAM is a special type of multi-carrier modulation that can be considered as an alternative to conventional OFDM with cyclic prefix (CP) for transmission over multi-path fading channels. Indeed, as it requires no CP, it has the advantage of a theoretically higher spectral efficiency. Furthermore, efficient pulse shaping can also be easily implemented with OFDM/OQAM. However, the classical channel estimation
Canadian Conference on Electrical and Computer Engineering, 2005.
The use of variable length codes (VLCs) is one of the key element in obtaining high compression r... more The use of variable length codes (VLCs) is one of the key element in obtaining high compression rates in source coding. However the transmission of VLCs also introduces a high risk of error propagation. In this context joint source-channel decoding can be an efficient alternative to the classical approach of separated source-channel decoding. Our paper illustrates this situation with the
The problem of conversion between different periodic sampling structures is of importance in a nu... more The problem of conversion between different periodic sampling structures is of importance in a number of applications related to multidimensional signal processing. For instance in areas of image processing, as multiresolution representations or high definition television, one has to modify sampling structures. For these types of processing finite impulse response (FIR) digital filters offer two main advantages, firstly a strictly linear phase, or a zero-phase, characteristic can be easily obtained, secondly they avoid the stability problem inherent to infinite impulse response (IIR) digital filters. In this paper, the design problem is stated for two-dimensional (2-D FIR) digital filters in the context of a transformation, defined by two integer parameters, which allows the conversion, in both directions, from an orthogonal to a quincunx sampling structure, which will be called (L,K) structure. The filter coefficients are obtained after a minimisation of the maximum error in the fr...
Sixth Multidimensional Signal Processing Workshop
Summary form only given. Two types of spatial sampling patterns, one with an orthogonal structure... more Summary form only given. Two types of spatial sampling patterns, one with an orthogonal structure and one having a quincunx structure, both related by two parameters, L and K, with integer values, have been investigated. The following results have been obtained: (1) the definition of a family of diamond-shaped filters having an ideal shape for an up- or down-sampling conversion with given parameters L and K; (2) the determination of a set of constraints in the frequency domain and their equivalent in the spatial domain for linear-phase 2D finite-impulse-response (FIR) digital filters; (3) the design of 2D FIR filters with specifications and constraints depending on the parameters L and K; (4) the presentation with a zone plane of the distortion introduced by the sampling pattern conversion for various values of L and K ; and (5) the cascading of two sampling pattern conversions in order to convert a (L1, K1) quincunx structure into a (L2, K2) quincunx structure
2012 International Symposium on Wireless Communication Systems (ISWCS), 2012
ABSTRACT
IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing, 1999
1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings
The problem of designing two-channel perfect reconstruction filter banks with odd length FIR line... more The problem of designing two-channel perfect reconstruction filter banks with odd length FIR linear phase analysis and synthesis filters is revisited. Based on an algebraic approach we introduce a complete and canonical lattice structure. Design examples show that, for short length filters, multiplierless realizations providing an acceptable frequency behaviour were attainable
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2016
2010 18th European Signal Processing Conference, Aug 1, 2010
2000 10th European Signal Processing Conference, Sep 1, 2000
2008 Ieee 19th International Symposium on Personal Indoor and Mobile Radio Communications, Sep 1, 2008
2008 Ieee International Conference on Communications, May 19, 2008
OFDM/OQAM is a special type of multi-carrier modulation that can be considered as an alternative ... more OFDM/OQAM is a special type of multi-carrier modulation that can be considered as an alternative to conventional OFDM with cyclic prefix (CP) for transmission over multi-path fading channels. Indeed, as it requires no CP, it has the advantage of a theoretically higher spectral efficiency. Furthermore, efficient pulse shaping can also be easily implemented with OFDM/OQAM. However, the classical channel estimation