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Digital Video Solutions to Final Exam 2013 Edited by Yang-Ting Chou PowerPoint PPT Presentation


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Digital Video Solutions to Final Exam 2013 Edited by Yang-Ting Chou Confirmed by Prof. Jar-Ferr Yang LAB: 92923 R, TEL: ext. 621 E-mail: [email protected] Page of MediaCore: http://mediawww.ee.ncku.edu.tw. Announcement. AVG: 107.833 STDEV: 16.4066. MAX: 134 MIN: 72. 1 (1). 1 (2).

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Digital Video Solutions to Final Exam 2013 Edited by Yang-Ting Chou

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Digital video solutions to final exam 2013 edited by yang ting chou

Digital Video

Solutions to Final Exam 2013

Edited by Yang-Ting Chou

Confirmed by Prof. Jar-Ferr Yang

LAB: 92923 R, TEL: ext. 621

E-mail: [email protected]

Page of MediaCore: http://mediawww.ee.ncku.edu.tw


Digital video solutions to final exam 2013 edited by yang ting chou

Announcement

AVG: 107.833

STDEV: 16.4066

MAX: 134

MIN: 72


Digital video solutions to final exam 2013 edited by yang ting chou

1 (1)


Digital video solutions to final exam 2013 edited by yang ting chou

1 (2)

1 (3)


Digital video solutions to final exam 2013 edited by yang ting chou

1 (4)


Digital video solutions to final exam 2013 edited by yang ting chou

1 (5)

Deblocking: Inverse 過程中變化係數有誤差,造成block邊界的視覺上不連續


Digital video solutions to final exam 2013 edited by yang ting chou

2 (a)

To deliver 3D contents, one simple and direct way is to combine both left and right view frames into single frame by a stereo packing formation such that the

traditional coding and transmission system can transmit them as the normal 2D videos.

(b)

H-Interleaved

V-Interleaved

Checkerboard

Bottom-Up

Temporal Interleaving

Side-by-Side (Quincunx Packing)

Side-by-Side


Digital video solutions to final exam 2013 edited by yang ting chou

Side-by-Side

Upconversion Processing

Side-by-side packing rearrangement

Upconversion Processing

Side-by-Side (Quincunx Packing)

Upconversion Processing

Side-by-side quincunx packing rearrangement

Upconversion Processing


Digital video solutions to final exam 2013 edited by yang ting chou

3


Digital video solutions to final exam 2013 edited by yang ting chou

4

MPEG-2 and MPEG-4 adopt object based; H.264 and HEVC adopt block based.

The compression rate. (HEVC約為H.264的1/2;H.264約為MPEG-2,MPEG-4的1/2)

The applications

(HEVCand H.264主要是應用於視訊會議;MPEG-2and MPEG-4主要是應用於CD或DVD)


Digital video solutions to final exam 2013 edited by yang ting chou

5

Reordered Block Data:

0, 1, -2, 0, 2, 0, 1, 0, -1, …

(a)

由後往前計算,計算有幾個非0值

0, 1, -2, 0, 2, 0, 1, 0, -1, …

TotalCoeffs = 5

TotalZeros = 4

TrailingOne = 2

由後往前計算,從第一個非0值往前計算幾個0值

0, 1, -2, 0, 2, 0, 1, 0, -1, …

由後往前計算,從第一個非0值往前計算幾個+/-1值,若遇到非0or 非+/-1 值,及停止

0, 1, -2, 0, 2, 0, 1, 0, -1, …


Digital video solutions to final exam 2013 edited by yang ting chou

Reordered Block Data:0, 1, -2, 0, 2, 0, 1, 0, -1, …

(b)

Shift 1

nA+nB+1=7 (111) (011)3

(1) nA=2, nB=4, nC = (nA + nB + 1)>>1=3

Coeff_token: 0000101 (查表)( TrailingOne = 2, TotalCoeffs = 5, nC = 3 )

(2) T1 (TrailingOne ) sign codes : 10 (- +)

(3) Level codes : 101110 (查表)

Level [2]: 1 (use Level_VLC0) 1

Level [1]: -2 (use Level_VLC1) 011

Level [0]: 1 (use Level_VLC1) 10

(4) TotalZeros code : 110 (查表) ( TotalZeros = 4, TotalCoeffs = 5 )

(5) Run_before codes : 10100110

Run_before[4]: ZerosLeft=4; run_before=1 10(查表)

Run_before[3]: ZerosLeft=3; run_before=1 10(查表)

Run_before[2]: ZerosLeft=2; run_before=1 01(查表)

Run_before[1]: ZerosLeft=1; run_before=0 1(查表)

Run_before[0]: ZerosLeft=1; run_before=1 0(查表)

Note: Level (1), with a value of +2, is encoded as +1. If there are less than 3 T1s, then the first non-T1 level will not have a value of +/-1 (otherwise it would have been encoded as a T1). To save bits, this level is decremented if positive and incremented if negative.


Digital video solutions to final exam 2013 edited by yang ting chou

Table – coeff_token mapping to TotalCoeff( coeff_token ) and TrailingOnes( coeff_token )


Digital video solutions to final exam 2013 edited by yang ting chou

Table – total_zeros tables for 4x4 blocks with TotalCoeff( coeff_token ) 1 to 7

Table – Tables for run_before


Digital video solutions to final exam 2013 edited by yang ting chou

6

(7%)

AIC:

The Advanced Image Coding (AIC) codec uses the existing algorithms from the H.264 and JPEG standards by modifying a bit to fit the needs of the codec.

More specifically, it combines intra frame block prediction from H.264 with a JPEG-style discrete cosine transform, followed by context adaptive binary arithmetic coding as used in H.264

JPEG XR:

(8%)

JPEG XR (abbr. for JPEG extended range) is a still-image compression standard and file format for continuous tone photographic images, based on technology originally developed and patented by Microsoft under the name HD Photo (formerly Windows Media Photo). It supports both lossy and lossless compression, and is the preferred image format for Ecma-388 Open XML Paper Specification documents.

AIC: DCT, Prediction, …

JPEG-XR: PCT, Hierarchical Transform, …

(5%)


Digital video solutions to final exam 2013 edited by yang ting chou

7

Intra Mode

Inter Mode

Search Range

Search Type

CU-based Mode Decision


Digital video solutions to final exam 2013 edited by yang ting chou

8


Digital video solutions to final exam 2013 edited by yang ting chou

9 (a)

(b)

Try all possible QP values and pick up the best one.


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