| 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? | |
