Burst Error Recovery for Huffman Coding

Kitakami, Masato; Nakamura, Satoshi

doi:10.1093/ietisy/e88-d.9.2197

Cited by 5 publications

(3 citation statements)

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“…These types of schemes work under the assumption of isolated bit errors for which the upcoming bit sequence can be resynchronized; not a threat in our encryption schemes, since we intensively flip bits in the entire VLC stream. For additional details on security techniques related to VLC bit streams, readers are referred to [16,19].…”

Section: Introductionmentioning

confidence: 99%

Partial Encryption of Entropy-Coded Video Compression Using Coupled Chaotic Maps

Almasalha

Hasimoto-Beltrán

Khokhar

2014

Entropy

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Due to pervasive communication infrastructures, a plethora of enabling technologies is being developed over mobile and wired networks. Among these, video streaming services over IP are the most challenging in terms of quality, real-time requirements and security. In this paper, we propose a novel scheme to efficiently secure variable length coded (VLC) multimedia bit streams, such as H.264. It is based on code word error diffusion and variable size segment shuffling. The codeword diffusion and the shuffling mechanisms are based on random operations from a secure and computationally efficient chaos-based pseudo-random number generator. The proposed scheme is ubiquitous to the end users and can be deployed at any node in the network. It provides different levels of security, with encrypted data volume fluctuating between 5.5-17%. It works on the compressed bit stream without requiring any decoding. It provides excellent encryption speeds on different platforms, including mobile devices. It is 200% faster and 150% more power efficient when compared with AES software-based full encryption schemes. Regarding security, the scheme is robust to well-known attacks in the literature, such as brute force and known/chosen plain text attacks.

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Section: Introductionmentioning

confidence: 99%

Partial Encryption of Entropy-Coded Video Compression Using Coupled Chaotic Maps

Almasalha

Hasimoto-Beltrán

Khokhar

2014

Entropy

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“…Therefore, we can say that the classes with the most impact require a more powerful error protection than the others. In such cases, unequal error protection schemes (UEP) [17][18][19][20][21] are considerably more efficient, in terms of final compression efficiency, than equal error protection schemes (EEP). The methods in [20,21] were specifically proposed for compressed data using Lempel-Ziv-Storer-Szymanski (LZSS) [6], a variant of LZ77 [5].…”

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confidence: 99%

On unequal error protection for LZSS compressed data

Souza¹,

Pellenz²,

Pereira³

2009

Ann. Telecommun.

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An unequal error protection scheme for Lempel-Ziv-Storer-Szymanski (LZSS) compressed data is proposed. The novel method divides the compressed data into short blocks, which allows for near-real-time operation. The error protection is obtained through the application of BCH codes and block interleavers. Compared to other methods found in the literature, the proposed scheme is either more efficiency in terms of compression efficient or in terms of decoding delay.

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“…Tais classes necessitam de uma proteção mais rigorosa contra erros. Este é um caso típico onde esquemas de proteção desigual de erros (UEP) podem ser usados com sucesso [17]- [19]. Importantes esquemas UEP para dados compactados usando o algoritmo LZSS foram propostos em [20], [21].…”

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Estratégia para Proteção de Arquivos Compactados Corrompidos por Surtos de Erros

Pereira¹,

Souza²,

Pellenz³

2007

Anais Do XXV Simpósio Brasileiro De Telecomunicações

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Resumo-Este trabalho apresenta uma estratégia de proteção desigual de erros para minimizar o impacto dos surtos de erros no armazenamento e na transmissão de arquivos compactados. A estratégia é feita para o algoritmo de compressão de dicionário adaptativo LZSS. Através de simulações computacionais foram investigadas quais classes de informação do LZSS são mais sensíveis aos surtos de erros. Neste trabalho propomos uma estratégia de proteção desigual que limita a propagação de erros no processo de descompressão. A estratégia de proteção proposta foi validada através de resultados numéricos, usando arquivos de texto padrões da base Calgary Corpus.Palavras-Chave-Proteção desigual de erros, compressão de dados, LZSS, codificação de canal.

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Burst Error Recovery for Huffman Coding

Cited by 5 publications

References 0 publications

Partial Encryption of Entropy-Coded Video Compression Using Coupled Chaotic Maps

Partial Encryption of Entropy-Coded Video Compression Using Coupled Chaotic Maps

On unequal error protection for LZSS compressed data

Estratégia para Proteção de Arquivos Compactados Corrompidos por Surtos de Erros

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