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Improved spatio-SNR FGS video coding scheme using motion compensation on enhancement-layer

Journal of Systems Engineering and Electronics 2006年第1期17卷 37-42页

作者： Jiang Tao Zhang Zhaoyang Ma Ran Shi Xuli Dept. of Electronic & Information Engineering School of Communication Shanghai Univ. Shanghai 200072 P. R. China

MPEG-4 fine-granularity-scalable （FGS） technology is an effective solution to resolve the network bandwidth varying because FGS provides very fine granular SNR scalability. However, this scalability is obtained with sacrifice of coding efficiency. An one-loop FGS structure is presented based on motion compensation （MC ＋ FGS） to improve the coding efficiency of base FGS. Then it describes and discusses the hybrid spatial-SNR FGS （FGSS） structure that extends SNR scalability of FGS to spatial scalability （spatio-SNR scalability）. FGSS structure inherent the low coding efficiency of FGS structure. Combining MC ＋ FGS structure with FGSS structure, a structure of MC ＋ FGSS structure is obtained which acquires both structures＇ advantages and counteracts both structures＇ defects. Experimental results prove the MC＋ FGSS structure not only obtains fine granular spatio-SNR scalability, but also achieves high coding efficiency.

关键词： fine-granularity-scalable coding efficiency motion compensation spatial scalability MPEG-4.

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Highly Efficient Audio coding With Blind Spectral Recovery Based on Machine Learning

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IEEE SIGNAL PROCESSING LETTERS 2022年 29卷 1212-1216页

作者： Kim, Jae-Won Beack, Seung Kwon Lim, Wootaek Park, Hochong Kwangwoon Univ Dept Elect Engn Seoul 01897 South Korea Elect & Telecommun Res Inst ETRI Daejeon 34129 South Korea

This letter proposes a new method for audio coding that utilizes blind spectral recovery to improve the coding efficiency without compromising performance. The proposed method transmits only a fraction of the spectral coefficients, thereby reducing the coding bit rate. Then, it recovers the remaining coefficients in the decoder using the transmitted coefficients as input. The proposed method is differentiated from conventional spectral recovery in that the coefficients to be recovered are interleaved with the transmitted coefficients to obtain the most data correlation. Further, it enhances the transmitted coefficients, which are degraded by quantization errors, to deliver better information to the recovery process. The spectral recovery is conducted recursively on a band basis such that information recovered in one band is used for the recovery in subsequent bands. An improved level correction for the recovered coefficients and a new sign coding are also developed. A subjective performance evaluation confirms that the proposed method at 40 kbps provides statistically equivalent sound quality to a state-of-the-art coding method at 48 kbps for speech and music categories.

关键词： Encoding Audio coding Decoding Quantization (signal) Correlation Bit rate Transforms Audio coding coding efficiency machine learning spectral enhancement spectral recovery

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Digital holographic memory using two-dimensional modulation code

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JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS 2001年第3B期40卷 1732-1736页

作者： Kume, T Yagi, S Imai, T Yamamoto, M NTT Cyber Space Labs Tokyo 1808585 Japan NTT Photon Labs Tokai Ibaraki 3191106 Japan

The degradation of reconstructed images from a digital holographic memory that uses highly sensitive strontium barium niobate as a recording medium was reduced using two-dimensional modulation codes that have low average intensity and high coding efficiency. The signal-to-noise ratios of the reconstructed images and hence the bit error rates of the data retrieved from the images were improved without reducing the coding efficiency.

关键词： digital holographic memory modulation code SBN signal-to-noise ratio bit error rate coding efficiency

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Hybrid motion estimation algorithm for secondary SP-frame coding based on inter-frame correlation

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ELECTRONICS LETTERS 2011年第7期47卷 439-440页

作者： Lai, K. K. Chan, Y. L. Fu, C. H. Siu, W. C. Hong Kong Polytech Univ Ctr Signal Proc Dept Elect & Informat Engn Kowloon Hong Kong Peoples R China

A hybrid motion estimation algorithm for secondary SP-frame coding is proposed. This hybrid algorithm effectively combines two existing techniques: one provides high coding efficiency and the other is computationally less intensive. The combination is based on inter-frame correlation, which is measured using the bit-count of its corresponding primary SP-frame. Experimental results show that this is an effective measure of selecting an appropriate domain for motion estimation in secondary SP-frame coding.

关键词： coding efficiency hybrid motion estimation algorithm interframe correlation motion estimation secondary SP-frame coding video coding

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DISCRETE REPRESENTATION OF STRAIGHT-LINES

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IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE 1984年第4期6卷 450-463页

作者： DORST, L SMEULDERS, AWM DELFT UNIV TECHNOL DEPT APPL PHYSDELFTNETHERLANDS

If a continuous straight line segment is digitized on a regular grid, obviously a loss of information occurs. As a result, the discrete representation obtained (e.g., a chaincode string) can be coded more conveniently than the continuous line segment, but measurements of properties (such as line length) performed on the representation have an intrinsic inaccuracy due to the digitization process. In this paper, two fundamental properties of the quantization of straight line segments are treated. 1) It is proved that every ``straight"" chaincode string can be represented by a set of four unique integer parameters. Definitions of these parameters are given. 2) A mathematical expression is derived for the set of all continuous line segments which could have generated a given chaincode string. The relation with the chord property is briefly discussed.","doi":"10.1109/TPAMI.1984.4767550","publicationTitle":"IEEE Transactions on Pattern Analysis and Machine Intelligence","startPage":"450","endPage":"463","rightsLink":"http://***/AppDispatchServlet?publisherName=ieee&publication=0162-8828&title=Discrete+Representation+of+Straight+Lines&isbn=&publicationDate=July+1984&author=Leo+Dorst&ContentID=10.1109/TPAMI.1984.4767550&orderBeanReset=true&startPage=450&endPage=463&volumeNum=PAMI-6&issueNum=4","displayPublicationTitle":"IEEE Transactions on Pattern Analysis and Machine Intelligence","pdfPath":"/iel5/34/4767540/***","keywords":[{"type":"IEEE Keywords","kwd":["Quantization","Low earth orbit satellites","Length measurement","Performance evaluation","Disruption tolerant networking","Laboratories","Physics","Pathology","Biomedical informatics","Encoding"]},{"type":"Author Keywords ","kwd":["quantization error","Chaincode string","chord property","coding efficiency","digitized straight lines"]}],"allowComments":false,"pubLink":"/xpl/***?punumber=34","issueLink":"/xpl/***?isnumber=4767540","standardTitle":"Discrete Representation of St

关键词： Quantization Low earth orbit satellites Length measurement Performance evaluation Disruption tolerant networking Laboratories Physics Pathology Biomedical informatics Encoding Author Keywords quantization error Chaincode string chord property coding efficiency digitized straight lines

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INTEGER COSINE TRANSFORMS: METHODS TO CONSTRUCT NEW ORDER 8, 16 FAST TRANSFORMS AND THEIR APPLICATION

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CYBERNETICS AND SYSTEMS ANALYSIS 2014年第6期50卷 913-929页

作者： Hnativ, L. O. Natl Acad Sci Ukraine V M Glushkov Inst Cybernet Kiev Ukraine

Matrix methods to construct simple fast integer order 16 type I, II cosine transforms of low complexity are considered. A new approach and a generalized method are proposed to construct integer order 8 cosine transforms and their fast algorithms without multiplication. A new integer step transform with fast algorithm is introduced. Two transforms are proposed, whose speed is 1.7 to 2.9 times greater and which provide a higher quality of video coding than standard H. 265 does.

关键词： discrete cosine transform integer cosine transform integer step transform fast algorithms coding efficiency computational complexity video coding standards

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Gauging sensory representations in the brain

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TRENDS IN NEUROSCIENCES 1999年第7期22卷 303-309页

作者： Buracas, GT Albright, TD Salk Inst Biol Studies Howard Hughes Med Inst La Jolla CA 92037 USA

The stream of information that enters a sensory system is a product of the ecological niche of an organism and the way in which the information is sampled. The most salient characteristic of this sensory stream is the rich temporal structure that is caused by changes in the environment and self motion of sensors (for example, vapid eye or whisker movements). In recent years, substantial progress has been made in understanding how such rapidly varying stimuli are represented in the responses of sensory neurons of a large variety of sensory systems. The crucial observation that has emerged from these studies is that individual action potentials convey substantial amounts of information, which permits the discrimination of rapidly varying stimuli with high temporal precision.

关键词： Sensory representation Information rate Ecologically relevant stimuli coding efficiency Timing precision Noise

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SHVC performance enhancement using superior step search algorithm

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ICT EXPRESS 2019年第3期5卷 206-210页

作者： Dhanalakshmi, A. Nagarajan, G. Balaji, L. Sathyabama Inst Sci & Technol Fac Elect Engn Chennai 600123 Tamil Nadu India Panimalar Engn Coll Dept EIE Chennai 600123 Tamil Nadu India Sathyabama Inst Sci & Technol Fac Elect Engn Chennai 600119 Tamil Nadu India Vel Tech Rangarajan Dr Sagunthala R&D Inst Sci & Dept ECE Chennai 600062 Tamil Nadu India

The SHVC (Scalable High efficiency Video coding) standard developed as an extension to H.265 HEVC (High efficiency Video coding) that focus on data transmission over heterogeneous network with wide scalability. In this paper a Superior Step Search (SSS) algorithm is proposed to enhance the PSNR performance along with coding efficiency without much increase in the computational complexity. The proposed SSS algorithm performs dynamic search to predict the best matching block using a fine search pattern. Simulation results show 0.5% average increased performance in PSNR and 32% coding efficiency in Bit rate when compared with the SHM reference software. (C) 2019 The Korean Institute of Communications and Information Sciences (KICS). Publishing services by Elsevier B.V.

关键词： coding efficiency Computational complexity PSNR Bit rate Time

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VIDEO COMPRESSION: DISCUSSING THE NEXT STEPS

VIDEO COMPRESSION: DISCUSSING THE NEXT STEPS

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IEEE International Conference on Multimedia and Expo

作者： Pereira, Fernando Univ Tecn Lisboa Inst Super Tecn Inst Telecomunicacoes Lisbon Portugal

ISBN: (纸本)9781424442904

Video compression has been intensively evolving for more than 20 years. Until recently, around 50% compression gains every 5 years were obtained, resulting in the current set of video coding standards. More recently, after the development of the very successful H.264/AVC standard, compression gains have been short and more difficult to reach than usual. In this context, this talk will discuss the future of video compression considering the emerging industry needs, notably in terms of promising technological novelties, and recent standardization initiatives targeting 3D video and further video compression efficiency.

关键词： video compression coding efficiency MPEG VCEG

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Efficient audio coding with optimized subband configurations

Efficient audio coding with optimized subband configurations

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Workshop on Applications of Signal Processing to Audio and Acoustics

作者： Ali, MT Mian, MS Univ Engn & Technol Dept Elect Engn Lahore Pakistan

ISBN: (纸本)0780391543

A dynamic subbands design selection scheme for perceptual audio coding is presented which optimizes the coding efficiency in association with all improved utilization of the masking potential of the signal. The choices for subbands design Selection include critical hands, uniform subbands, uniform subbands with a non-uniform last hand and a non-uniform-non-critical (NUNC) subbands distribution. A particular consideration is given to corresponding critical band boundaries while formulating NUNC subbands, to minimize the perception of coding noise. The design selection decision is made by First identifying the best tradeoff between empty quantizer slots and amount of side information, followed by a minimization or the perceptual entropy (PE) estimates. A further analysis is carried Out to identify the prominent spectral peaks (PSPs), with a view to efficiently utilize their masking potential by the bit allocation algorithm which makes a bit cut first to subbands with PSPs. Test results based oil ITU-R recommendation BS.1 116 show that Our coding scheme performs slightly better as compared to MPEG-4 AAC verification model (V-M) for a majority of signal types from the SQAM database. The paper Concludes with a discussion Of future research implications of the work.

关键词： audio coding entropy ITU-R recommendation BS.1116 MPEG-4 AAC verification model SQAM database bit allocation algorithm coding efficiency coding noise critical bands dynamic subbands design selection scheme nonuniform last band nonuniform-noncritical subb Audio coding Subbands Allocation Algorithm critical band entropy code efficiency side information

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