Knowledge-based approach to JPEG acceleration
نویسندگان
چکیده
JPEG picture compression and related algorithms are not only used in still picture compression, but also to a growing degree for moving picture compression in telecommunication applications. Real-time JPEG compression and decompression are crucial in these scenarios. We present a method to significantly improve the performance of software based JPEG decompression. Key to these performance gains are adequate knowledge of the structure of the JPEG coded picture information and transfer of structural information between consecutive processing steps. Our implementation achieved an 80% performance increase decompressing typical JPEG video streams.
منابع مشابه
Nios II Processor-Based Hardware/Software Co-Design of the JPEG2000 Standard
JPEG2000 is a recently standardized image compression algorithm that provides significant enhancements over the existing JPEG standard. JPEG2000 differs from widely used compression standards in that it relies on discrete wavelet transform (DWT) and uses embedded bit plane coding of the wavelet coefficients [1]. Due to the bit-oriented processing techniques used in the standard, full implementa...
متن کاملTeaching The Principles Of System Design, Platform Development And Hardware Acceleration
Development of embedded systems composed of tightly coupled microelectronic devices and several stacks of software layers adapted to it has evolved into a more platform based design methodology. We offer a lecture in the field of ESL design that provides a broad spectrum of theoretical background. It is escorted by a laboratory where starting from a C source code a platform with a hardware acce...
متن کاملمروری بر روش های نهاننگاری در JPEG و بررسی امنیت آن ها
Abstract: JPEG is the most applicable image format in digital communication. In recent years, various steganography methods have been proposed for it. This paper aims to study and classify JPEG steganography schemes and introduce different methods to improve their security based on cover. Accordingly, the effective factors in security that are related to the cover such as double compression, sp...
متن کاملIntelligent identification of vehicle’s dynamics based on local model network
This paper proposes an intelligent approach for dynamic identification of the vehicles. The proposed approach is based on the data-driven identification and uses a high-performance local model network (LMN) for estimation of the vehicle’s longitudinal velocity, lateral acceleration and yaw rate. The proposed LMN requires no pre-defined standard vehicle model and uses measurement data to identif...
متن کاملارائه روشی برای پیشپردازش تصویر جهت بهبود عملکرد JPEG
A lot of researchs have been performed in image compression and different methods have been proposed. Each of the existing methods presents different compression rates on various images. By identifing the effective parameters in a compression algorithm and strengthen them in the preprocessing stage, the compression rate of the algorithm can be improved. JPEG is one of the successful compression...
متن کامل