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Improved Gray Scale (IGS) Code

Improved Gray Scale (IGS) Code. Exercise 2 M023010098 謝芷瑜. Processing. Implement 4-bit IGS code, LSB is Zero Random Myself Transmission error 1%, 5%, 10%, 15% Error correction Used Hamming code, correction one bit. Design LSB by Myself. (7, 4)Hamming code. 3 Types.

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Improved Gray Scale (IGS) Code

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  1. Improved Gray Scale (IGS) Code Exercise 2 M023010098 謝芷瑜

  2. Processing • Implement 4-bit IGS code, LSB is • Zero • Random • Myself • Transmission error • 1%, 5%, 10%, 15% • Error correction • Used Hamming code, correction one bit

  3. Design LSB by Myself

  4. (7, 4)Hamming code

  5. 3Types No Error, No Protect Error, No Protect Error, Protect

  6. No Error No Protect Zero Random Myself 31.9082 27.354 27.5911

  7. Compression：LSB Method

  8. 1% Error - Zero No Protect Protect 23.9821 30.6509

  9. 1% Error - Myself No Protect Protect 22.8602 27.0754

  10. 5% Error - Zero No Protect Protect 17.7702 22.4141

  11. 5% Error - Myself No Protect Protect 17.3933 21.6115

  12. Compression：with/without protect

  13. Compression：with/without protect

  14. Compression：with/without protect

  15. Conclusion • 對於改善4-bit IGS code，LSB使用Myself方法稍微優於Random，而其中Zero的效果最好(PSNR最高)。 • 由於ErrorProtection採用(7, 4)Hamming code，只能更正one bit。當發生1%Error時，能被更正96%~98%的錯誤；若為5% Error，更正率降為70%~79%，代表錯誤發生2bits以上的機率提升許多。

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