Wavelet image compression for mobile/portable applications

Ravasi, M.; Mattavelli, Marco; Mlynek, D.; Buttar, Avtar Singh; Soudagar, S.

doi:10.1109/30.793608

Cited by 4 publications

(5 citation statements)

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“…A redesigning of the DWT algorithm, in order to change the operation scheduling, allows to reduce the temporary data lifetime and to optimize the overall system performance [1]- [3]. The SW-LbL approach [1], [2] allows to significantly reduce both external memory size and bandwidth at the price of a slightly more complex implementation and the need of a small on-chip memory. The main idea behind this approach is to exploit data dependencies between horizontal and vertical processing in order to try to use temporary samples as soon as they are available.…”

Section: B Sliding-windows Layer-by-layer Approachmentioning

confidence: 99%

“…Extended state of the art researches showed that DWT coding and decoding algorithms can be redesigned by changing the scheduling of operations, yielding more efficient implementations with reduced memory requirements [3], [4], [6]. Further work proposed a variety of strategies, dealing with the trade-off among implementation complexity, cache memory requirements and external memory requirements [1], [2]. Thus, efficient implementations must be investigated to fit different system scenarios.…”

mentioning

confidence: 99%

“…Each of these strategies corresponds to an implementation characterized in parametric form in terms of generic architectural features such as on-chip memory size, on-chip data-path bandwidths, overall filter complexity, external memory size and external data-path bandwidths [1]- [3]. This paper presents the implementation of an hardware DWT decoder based on "Sliding Windows Layer-by-Layer" architecture (SW-LbL) [1], [2]. Among the different approaches studied in literature, the SW-LbL approach [1], [2] offers a good trade-off between system performance and complexity.…”

mentioning

confidence: 99%

“…This paper presents the implementation of an hardware DWT decoder based on "Sliding Windows Layer-by-Layer" architecture (SW-LbL) [1], [2]. Among the different approaches studied in literature, the SW-LbL approach [1], [2] offers a good trade-off between system performance and complexity. The main result is a sensible reduction of the bandwidth and of the size of external memory, at the price of a small increase of implementation complexity.…”

mentioning

confidence: 99%

“…This paper is organized as follows: Section II presents the "Sliding-Windows Layer-by-Layer" architecture [1], [2] chosen to implement the DWT decoder, comparing it with the classical architecture. Section III describes the VHDL implementation of the decoder.…”

mentioning

confidence: 99%

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A scalable and programmable architecture for 2-D DWT decoding

Ravasi¹,

Tenze

Mattavelli

2002

IEEE Trans. Circuits Syst. Video Technol.

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The compression of still images by means of the Discrete Wavelet Transform (DWT), adopted in the JPEG-2000 and MPEG-4 standards, is becoming more and more widespread because it yields better performances than other compression methods, such as DCT. The demand of efficient architectures for 2-D DWT coding and decoding for a variety of different applications and embedded systems is rapidly increasing. This paper presents the implementation of a 2-D DWT decoder for Mallat tree decomposition, suitable for low power applications, such as portable devices. The decoder design has been synthesized and validated in 0.35 µm CMOS technology. The architecture is scalable according to the desired maximum image size, the maximum DWT kernel length and arithmetic accuracy, and it is programmable at run-time to process different image sizes and to use different DWT kernels.

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Section: B Sliding-windows Layer-by-layer Approachmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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A scalable and programmable architecture for 2-D DWT decoding

Ravasi¹,

Tenze

Mattavelli

2002

IEEE Trans. Circuits Syst. Video Technol.

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Image Compression System for Mobile Communication: Advancement in the Recent Years

Reaz

Akter

Mohd-Yasin

2006

J CIRCUIT SYST COMP

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Mobile communication has a great potential to the users due to fulfilling the dreams of real-time multimedia communication like voice, image, and text. The huge amount of data redundancy in still image should be compressed using exact image compression algorithm (ICA) before transmitting via wireless channel. Thus, an ICA should be adaptive, simple, and cost-effective and suitable for feasible implementation. Hardware implementation of the different algorithms has improved using modern, fast, and cost-effective technologies. The main aim of this paper is to review and demonstrate various ICAs developed based on image transmission via wireless channel as well as their hardware implementation. Finally, this review makes bridge for researchers to the future relative studies between different algorithms and architectures, and stands as a reference point for developing more controlling and flexible structures.

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