Data Compression | Helpdice

MCQ Problems / Explanations

Expansion of LZW Coding is

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Expansion of LZ Coding is

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Compression Technique used in Audio is

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Compression Technique used in Image Video is

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_________ is normally used for the data generated by scanning the documents, fax machine, typewriters etc.

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Entropy Coding is an __________

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Transform coding, vector quantization are examples for

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Shannons theorem is also called

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Which model is known as ignorance model?

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The probability density function of the envelope of narrow band noise is

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Which conveys more information?

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The resulting image of sampling and quantization is considered a matrix of real numbers. By what name(s) the elemen...

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For a continuous image f(x, y), Quantization is defined as

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The SNR value can be increased by the number of levels.

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The mutual information between a pair of events is

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Quantization is a ........process.

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Which is a quantization process?

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Spread spectrum is used for

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The minimum sampling rate is called?

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Which encoding is based on the science of psychoacoustics, which is the study of how people perceive sound?

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According to Nyquist theorem, how many times the highest frequency we need to sample an analog signal?

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Which audio/video refers to on-demand requests for compressed audio/video files?

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The spectral density of white noise is .

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Non uniform quantizer

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Uniform quantizer is also called as

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The main approaches to adapting the quantizer parameters:

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If a Zero is assigned a quantization level, then what is the type of quantizer?

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If a Zero is assigned a decision level, then what is the type of quantizer?

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Which of the folowing is/are correct for uniform quantizer

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The set of inputs and outputs of a quantizer can be

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If {x}n is the source output and {y}n is the reconstructed sequence, then the squared error measure is given by

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Which of the following statement is correct for comparing scalar quantization and vector quantization?

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What is a Lloyd quantizer?

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The output signal of a scalar quantizer has property

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What is the signal-to-noise ratio (SNR)?

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Which of the following characterizes a quantizer

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An image transmitted using wireless network:

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What is image?

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To remove archival compression and restore the data to column store compression

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Which is the image processing technique used to improve the quality of image for human viewing?

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The best visual compression quality is achieved using

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Without losing quality, JPEG-2000 can achieve compression ratios of

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In a typical picture, most pixels will be

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The idea with wavelets is to represent a complicated function by

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A coding scheme that takes advantage of long runs of identical symbols is called as

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Where does the Hidden Markov Model is used?

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Algorithm used for solving temporal probabilistic reasoning

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Application of LZW

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Compression packages which use an LZ77-based algorithm followed by a variable-length coder.

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LZ78 has compression but very decompression than

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Full form of GIF

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Deflate = ...........

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LZ77 and LZ78 are the two algorithms published in papers by Abraham Lempel and Jacob Ziv in 1977 and 1978

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Adaptive dictionary -

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Static dictionary -

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If the probability of encountering a pattern from the dictionary is p, then the average number of bits per pattern ...

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In dictionary techniques for data compaction, which approach of building dictionary is used for the prior knowledge...

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Information is the

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How many passes does lossy compression makes frequently?

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Which type of method is used is used to compress data made up of combination of symbols?

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Which of the following is the first phase of JPEG?

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Which of the following is not a part of the channel coding?

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A Huffman code: A = 1, B = 000, C = 001, D = 01 , P(A) = 0.4, P(B) = 0.1, P(C) = 0.2, P(D) = 0.3 The average number...

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A Huffman encoder takes a set of characters with fixed length and produces a set of characters of

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Huffman coding is an encoding algorithm used for

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The basic idea behind Huffman coding is to

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An alphabet consist of the letters A, B, C and D. The probability of occurrence is P(A) = 0.4, P(B)= 0.1, P(C) = 0....

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Applications of Huffman Coding

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The main advantage of a Tunstall code is that

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Tunstall coding is a form of entropy coding used for

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In the Tunstall code, all codewords are of However, each codeword represents a _________ number of letters.

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The unary code for 4 is __________

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The unary code for a positive integer n is simply n _ followed by a __

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Running time of the Huffman algorithm, if its implementation of the priority queue is done using linked lists

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Running time of the Huffman encoding algorithm is

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An optimal code will always be present in a full tree?

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In Huffman coding, data in a tree always occur in

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Bits are needed for standard encoding if the size of the character set is X

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Which bit is reserved as a parity bit in an ASCII set?

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The redundancy is zero when

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Unit of redundancy is

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The difference between the entropy and the average length of the Huffman code is called

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How many printable characters does the ASCII character set consists of?

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The best algorithms for solving Huffman codes

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The Huffman procedure is based on observations regarding optimum prefix codes, which is/are

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Huffman codes are codes and are optimum for a given model (set of probabilities).

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Sequence of code assigned is called

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In how many parts we can divide audio and video services into broad categories?

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Which of the following are lossy methods?

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Which of the following are Lossless methods?

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In which type of Data Compression, the integrity of the data is preserved?

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Point out the correct statement:

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Which of the following compression type is supported by SQL Server 2014?

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Markov model is often used when developing coding algorithms for

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For models used in lossless compression, we use a specific type of Markov process called a

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Composite source models is a combination or composition of several sources. In which how many source being active a...

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Full form of ASCII is

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The set of binary sequences is called a , and the individual members of the set are called _________

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A code in which no codeword is a prefix to another codeword is called as

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Self information should be .

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