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By: Batch -7

Md. Nusrath Shahana (08-569)

K. Sireesha (08-556)

K. Navya (08-547)

K. Likhitha (08-557)

Guided by:

J. Krishna PriyaM.Tech

Assistant Professor

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Start

Audio/Video as input

Watermark embedding

Encrypt the dataembedded audio/video

Decrypt the data

embedded audio/video

Extracting embedded data

Stop

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Watermark Embedding

Audio/Video Input

Decryption

Extracting embedded data

EncryptionUser

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Audio/Videoinput

Audio/Video

input

Watermark

embedding

Watermark

embedding

Encryption

Encryption Decryption

Decryption Extracting

embedded data

Extracting

embedded data

1: get input files

2: embedd the secret data

3: encrypt

4: decrypt

5: extract the secret data

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Audio/Video

input

Watermark

embedding

Encryption

DecryptionExtracting

embedded data

1: get input files

2: embedd the secret data

3: encrypt

4: decrypt

5: extract the secret data

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Framework

Selective Embedding

Block Partitioning

Erasure Handling

Frame Synchronization Markers

Soft Decoding

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Fig. 2. Embedder flowchart of the proposedvideo data hiding framework for a singleframe.

Fig. 1. Embedder flowchart of the proposed video data hiding framework for a single frame.

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Fig. 2. Decoder flowchart of the proposed video data hiding framework for

a single frame.

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Selection of host signal samples.

Frame selection

Frequency band determination

Block selection

Coefficient selection

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Fig. 3. Sample coefficient mask denoting the selected frequency band.

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Fig. 4. Typical block partitioning for message bits and frame synchronizationmarkers.

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Fig. 5. RA encoder (u denotes source bits and u + v denote encoded bits).

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T consecutive frames indexing from 0 to T-1.

Frame indices are represented by K2 bits whereK2>>log2T.

RK2 blocks are reserved for frame markers.

T(N-RK2) blocks remain for message bits.

K1=[T(N-RK2)/R]

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Two frame index values: fcur and fpre.

Rules to decode u1:

fcur>T, skip the frame

fcur=fpre, skip the frame

Otherwise, process the frame

fcur

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FZDH vs QIM

Common video processing attacks

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Fig. (a) Intra frames, 48 dB average embedding

distortion.

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Fig. (b) Inter frames, 48 dB average embedding

distortion.

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Fig. (c) Intra frames, 51 dB average embedding

distortion.

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Fig. (d) Inter frames, 51 dB average embedding

distortion.

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Observing the effect of the parameters on thenumber of selected block rate.

Observing the decoding error performance againstcompression attack.

Testing the performance of the method againstanother common video processing: frame-rateconversion.

Testing the scaling performance.

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FZDH is superior to QIM.

Makes use of erasure correction capability of RAcodes.

Robust to frame manipulation attacks.

Can be successfully utilized in video data hiding

applications.

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