1 100 test quiz of multimedia 1 JPEG encoder input output 3 + Adaptive quatization 5 + VLC 2 + DCT 4 + Zigzag scaning 1 + Partitions image 2 what is JPEG DCT a Transforms a image from the spatial domain to frequency domain b Transforms a signal or image from the spatial domain to frequency domain c Transforms a slice from the spatial domain to frequency domain 3 VCD uses coding a MPEG 2 b MPEG 1 c MPEG 4 d MPEG 7 4 Smallest fundamental unit of MPEG video data structure a Bit b Block c Marcoblo.
100 test quiz of multimedia 1.JPEG encoder input output + Adaptive quatization + VLC + DCT + Zigzag scaning + Partitions image what is JPEG-DCT a.Transforms a image from the spatial domain to frequency domain *b.Transforms a signal or image from the spatial domain to frequency domain c Transforms a slice from the spatial domain to frequency domain VCD uses coding a MPEG-2 b *MPEG-1 c MPEG-4 d MPEG-7 4.Smallest fundamental unit of MPEG video data structure a Bit b Block c Marcoblock d *Pixel 5.Characterization of DCT coefficient matrix a *Small in upper left large in upper right b Small in upper right large in below right c Radom 6.what does the slice header carry a Synchronization information b *Address information c Dimension information 7.I picture is a *Macroblock code without prediction b Macroblock code with forward and backward prediction c Macroblock code with forward prediction 8.Typical length of GOP a 25 b *15 c 16 d 24 9.The head of GOP a P picture b B picture c *I picture 10.Quantity bit of sequence header in MPEG data structure a *32 b 16 c d 64 11 What is the type of data in pes a video and audio b video c audio d *single ES add packet header 12.What is the final transport packet of MPEG filled a not change b *stuffing with 0xFF bytes c stuffing with 0x00 bytes d radom bytes 13.What dose bits of the PES header a quantity information b *identifying the source of the payload c synchronization information 14.What dose MPEG use to replace signal RGB a *Y Cb Cr b Y Cg Cr c Y Cg Cb d Cr Cg Cb 15.What is the most commonly video format used in MPEG-2 a 4:4:4 b 4:2:2 c *4:2:0 d 4:4:2 16.What dose prediction a increase speed b detect error c eliminate time delay d *encode and decode picture 17.Why is picture anchored before decoding a decrease error and repair error b *the encode transmit picture in order differ from source picture c for prediction to decode 18.How is MPEG scaning a Zig zag scaning b Alternate scaning c *Both 19.The packet header MPEG data transport have a *13 b c d 16 20.What is the remaining space in the final transport packet payload MPEG filled a *fill with stuffing bytes =0xFF b fill with stuffing bytes =0x00 c fill with stuffing bytes =radom d not fill 21.The length of MPEG data transport packet is a fixed-side 128 byte b variable length c *fixed-side 188 byte 22 bits packet header of MPEG transport packet a address receiver b synchronization and stamp c *specifying length of the adaptive filed 23 The data of MPEG-2 transport stream is a video stream b audio stream c *any type of data d text 24 Process demultiplexing 1+ finding the PAT by select packets with PID=0x0000 3+ reading the PIDs for the elements of a desire program from its PMTs 2+reading PIDs for the PMTs 4+detecting packets with the desire PIDs end routing them to decode 25.What dose PID a discriminate address b *discrimination stream of video audio or other program element 26.What are the video format used in MPEG a *4:4:4 b *4:2:0 c 4:4:2 d *4:2:2 27.Dimension of a screen is used on HDTV a *16:9 b 1:1 c 4:3 28.Output rates of H261 algorithn is a 2.048 Mb/s b *P x 64 Kb/s (P is a integer from to 30) c 1.024 Mb/s d Mb/s 29.The bandswith requrement for alalogue HDTV a Mhz b 6.5 Mhz c Mhz d *12 Mhz 30.How many horizontal were HDTV used a over 1000 lines b 525 lines c 625 lines d *a simple multiple of one or both the vertical used in conventional TV 31 Output rates of H263 is a 64 Kb/s b 32 Kb/s c *20 Kb/s d