Question | Answer |
Each 8x8 pixel character takes this many bytes to store | |
A 640x480 vector image has this number of lines | |
Bitmap images are coded using up to 256 different colours requiring this number of bytes per pixel | |
Uncompressed telephone speech is sampled at this many kHz | |
The data stream of an uncompressed telephone speech is at this rate in Kbits/sec | |
Uncompressed CD quality audio is sampled at this many kHz | |
Uncompressed CD quality audio is quantized at this many bits per sample | |
The data stream of an uncompressed CD quality audio is this at this rate | |
For uncompressed video luminance and chrominance of each pixel are coded using this many bytes | |
The data stream of uncompressed non HD video is this | |
For a good decompression, the time taken to decompress should be at most this number of ms (milliseconds) | |
For a good decompression, random access to individual frames should be possible in this time frame | |
A good decompression should be independent of frame size - Yes or No | |
Compression in software implies expensive, faster, and high quality solution - Yes or No | |
Compression in Hardware implies expensive, faster, and high quality solution - Yes or no | |
This type of coding is lossy. It takes into account the semantics of the information and plays with the frequencies and the colours | |
This type of encoding is lossles. Data prior to encoding is identical to data fater encoding | |
Most known coding techniques use a combination of the previous two. It is known as ____ | |
When compressing still images, video, and audio data streams, quantization happens BEFORE entropy coding - Yes or No | |
When preparing images for compression, an Digital-to-Analog conversion of the original is done - Yes or No | |
During image processing, this lossless process helps seeparate images into parts of differing importance (w.r.t. image's visual quality) | |
Quantization is a lossless process - Yes or No | |
This type of compression is used for dialog mode applications. The same amount of time is needed for decoding and encoding | |
In asymmetric compression, encoding is only performed once - Yes or No | |
In asymmetric compression, decoding is also performed once - Yes or No | |
Using RLE - compress this: YOOOOOUUUSSSS UUCCCCCKKKKKKKK | |
Using RLE - compress this: BACCCCHHHHH CCHEEEEEENNNIINNNNGGGG | |
Using RLE - decompress this: T4!immmefor d6!aQu10!e6!z | |
Using Zero Suppression - compress this:01001000100000001 | |
Using Zero Suppression decompress this: 010 000 101 100 | |
This type of text coding determines frequently occurring pairs of bytes such as 're' 'in'. These are replaced by single bytes that dont occur anywhere like the uncommon letter 'x' | |
This type of statistical coding uses an equal number of bits to represent each symbol. A message of N symbols requires >= log2(N) bits per symbol | |
The previous answer is good for encoding symbols with non equal probability of occurrence - Yes or No | |
This data structure is used for huffman coding | |
In Huffman coding shortest code is assigned to the most frequently occurring character - Yes or No | |
This iterative process is when processing and quantization steps are repeated iteravely. | |
When applying differential encoding to videos, when motion is involved (i.e. bg changes) this is used | |
Differential encoding is lossless - Yes or No | |
During JPEG picture preparation, the compression algorithm cuts up the image in separate blocks of pixes that are this dimension - X * X. What is X? | |
During JPEG picture preparation, name one of the possible ways that planes can be assigned colors. | |
In human vision luminance is more important than chrominance - Yes or No | |
A JPEG image using YUV or YIQ can use 4:2:3 and 4:1:1 ratio. However these are not the most popular choice. What ratio is? | |
JPEG quality settings (normal, fine, very fine...) are part of this step in JPEG compression | |
When decompressing a JPEG image using Inverse DCT, the result is lossy - Yes or No | |
For transmission, an audio compressor will perform an analog to digital tranformation - Yes or No | |
Most codecs are lossy - yes or no | |
The AVI codec however, is lossless - Yes or No | |
This audio codec is the most common and contains up to 6 discrete channels of sound and supports audio sample rates up to 48 kHz | |
MP3 digital file using bitrate 128 kbit will result in a file that is how much smaller than the size of a normal cd audio of the same file? | |
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