1. Who developed the MPEG video compression standard?
(A) ISO/IEC
(B) ITU-T
(C) IEEE
(D) IETF
2. Which of the following is a key technique used in MPEG compression?
(A) Spatial redundancy removal
(B) Temporal redundancy removal
(C) Frame interpolation
(D) Motion detection
3. Which of the following frame types are used in MPEG encoding?
(A) I, B, and P frames
(B) A, B, and C frames
(C) I, P, and Q frames
(D) B, C, and D frames
4. What is the main purpose of I-frames in MPEG compression?
(A) To store motion vectors
(B) To predict future frames
(C) To serve as reference frames
(D) To store difference data
5. Which frame type in MPEG is bidirectionally predicted?
(A) I-frame
(B) P-frame
(C) B-frame
(D) D-frame
6. What does H.264 primarily aim to improve over MPEG-2?
(A) Audio quality
(B) Bitrate efficiency
(C) Frame rate
(D) Color depth
7. Which H.264 feature allows variable block size motion estimation?
(A) CABAC
(B) Sub-pixel estimation
(C) VBSME
(D) DCT
8. Which entropy coding method is used in H.264 for better compression?
(A) RLE
(B) Huffman
(C) CABAC
(D) Arithmetic coding
9. What is the role of motion vectors in video compression?
(A) Improve audio syncing
(B) Estimate brightness
(C) Represent object motion
(D) Reduce spatial redundancy
10. Which of the following is true about P-frames?
(A) They are used only in audio compression
(B) They rely on previous I or P frames
(C) They are larger than I-frames
(D) They cannot be decoded independently
11. Which standard is more advanced in terms of compression:
(A) MPEG-1
(B) MPEG-2
(C) MPEG-4
(D) MPEG-7
12. Which MPEG version introduced support for object-based compression?
(A) MPEG-1
(B) MPEG-2
(C) MPEG-4
(D) MPEG-7
13. Which of the following is an application of MPEG-2?
(A) 4K streaming
(B) DVD video
(C) Online image compression
(D) Audio compression
14. Which component removes temporal redundancy in H.264?
(A) DCT
(B) Intra prediction
(C) Motion estimation
(D) CABAC
15. What is the function of a Group of Pictures (GOP) in MPEG?
(A) It enhances audio quality
(B) It groups similar colors
(C) It defines the sequence of frames
(D) It compresses sound data
16. Which of the following is NOT a tool used in H.264 compression?
(A) Intra prediction
(B) Transform coding
(C) Motion estimation
(D) Analog filtering
17. Which transform is used in H.264?
(A) Discrete Cosine Transform
(B) Wavelet Transform
(C) Haar Transform
(D) Walsh-Hadamard Transform
18. In H.264, what does Intra-frame prediction refer to?
(A) Predicting future frames
(B) Prediction using frames from different streams
(C) Prediction within a single frame
(D) Prediction using I and B frames
19. Which H.264 feature improves compression by adapting the context of data?
(A) CABAC
(B) DCT
(C) Motion compensation
(D) GOP structure
20. What is the main advantage of B-frames in MPEG?
(A) Low computational cost
(B) Increased motion accuracy
(C) Lower bitrate
(D) Independent decoding
21. Which layer in MPEG handles synchronization and multiplexing?
(A) Application layer
(B) Transport layer
(C) System layer
(D) Audio layer
22. Which H.264 profile is best suited for high-definition broadcasting?
(A) Baseline
(B) Main
(C) Extended
(D) High
23. What is the purpose of a decoder in video compression?
(A) Store the video in memory
(B) Encode the original video
(C) Convert compressed data back to video
(D) Analyze noise in the signal
24. Which term refers to the ratio of data compression to quality loss?
(A) Frame rate
(B) Bitrate
(C) Compression ratio
(D) Quality factor
25. In MPEG, what does the term “prediction error” refer to?
(A) Frame mismatch
(B) Difference between predicted and actual frame
(C) Compression noise
(D) Bitrate loss
26. What type of compression is used in MPEG standards?
(A) Lossless
(B) Run-length
(C) Lossy
(D) Huffman only
27. What kind of video compression does H.264 use?
(A) Spatial only
(B) Temporal only
(C) Both spatial and temporal
(D) Color space compression
28. Which of the following is true about MPEG-1?
(A) It supports HD resolution
(B) It’s optimized for internet streaming
(C) It was designed for CD-ROM quality video
(D) It uses only intra-coded frames
29. In H.264, what is a macroblock typically sized at?
(A) 4×4 pixels
(B) 8×8 pixels
(C) 16×16 pixels
(D) 32×32 pixels
30. Which of the following is NOT part of the MPEG family?
(A) MPEG-1
(B) MPEG-2
(C) MPEG-5
(D) MPEG-7
31. Which of the following is true about H.264 baseline profile?
(A) It supports CABAC
(B) It is suitable for low-latency applications
(C) It supports B-frames
(D) It’s used in Blu-ray
32. Which feature allows H.264 to compress high-motion videos effectively?
(A) Static segmentation
(B) Temporal compression
(C) Frame duplication
(D) Motion deblurring
33. Which coding technique does H.264 use to achieve better compression than MPEG-2?
(A) DPCM
(B) CABAC
(C) PCM
(D) FFT
34. In MPEG, which frames are coded without reference to other frames?
(A) B-frames
(B) P-frames
(C) I-frames
(D) D-frames
35. What is the function of the quantization step in video compression?
(A) Motion detection
(B) Reducing bit-depth of coefficients
(C) Encoding frames
(D) Rearranging pixels
36. What does a decoder require to reconstruct B-frames?
(A) Only the I-frame
(B) The current and previous B-frame
(C) Two reference frames (past and future)
(D) No reference frames
37. Which organization standardized H.264?
(A) ISO
(B) IEEE
(C) ITU-T and ISO/IEC
(D) W3C
38. Which of these is a benefit of inter-frame compression?
(A) Increased noise
(B) Reduced quality
(C) Lower storage size
(D) Higher latency
39. What is the full form of GOP in MPEG?
(A) Group of Pixels
(B) Gradient of Prediction
(C) Group of Pictures
(D) Gradient of Pixels
40. What type of compression does intra-frame use?
(A) Temporal
(B) Inter-frame
(C) Spatial
(D) Hybrid
41. Which H.264 tool helps eliminate spatial redundancy?
(A) Motion compensation
(B) Intra prediction
(C) CABAC
(D) GOP
42. What does “bitrate” in video compression refer to?
(A) The number of frames per second
(B) The resolution of the video
(C) The amount of data processed per unit time
(D) The contrast ratio
43. Which of the following supports scalable video coding?
(A) MPEG-2
(B) MPEG-4 Part 10
(C) H.261
(D) JPEG
44. Which term describes H.264’s ability to support various devices and networks?
(A) Scalability
(B) Flexibility
(C) Portability
(D) Compatibility
45. Which is the most compressed frame type in MPEG?
(A) I-frame
(B) P-frame
(C) B-frame
(D) D-frame
46. Which compression standard is widely used in Blu-ray discs?
(A) MPEG-2
(B) H.264
(C) JPEG
(D) MPEG-1
47. Which frame prediction mode is used in intra-frame coding?
(A) Past frame prediction
(B) Future frame prediction
(C) Spatial prediction
(D) Motion estimation
48. Which aspect of video compression helps with faster streaming?
(A) Higher resolution
(B) Efficient decoding
(C) Increased frame rate
(D) Large buffer size
49. Which of the following is a drawback of using B-frames in video compression?
(A) Increased decoding speed
(B) Higher compression ratio
(C) Greater computational complexity
(D) Reduced video quality
50. What does the term “latency” refer to in video streaming using compressed formats?
(A) Compression quality
(B) Time delay in playback
(C) File size
(D) Frame resolution
