由於傳輸通道的影響，會使得影像的品質降低，特別經過壓縮後的影片，對於通道所造成的錯誤，影響更為嚴重，甚至會有錯誤傳遞(error propagation)的情形發生，前向錯誤校正（Forward Error Correction; FEC）則常被使用來改善傳輸通道錯誤的影響。在這裡我們針對可調性視訊編碼標準(Scalable Video Coding; SVC)所壓縮的影片加上不等錯誤保護(Unequal Error Protection, UEP)來降低通道錯誤所造成影片的失真，而且在限制的資料傳輸率下對於特定的影片用動態規劃演算法（Dynamic programming）找出一組最適合的里德所羅門碼 (Reed Solomon code) 的碼率能使得重建回來的影片有最小的失真。另外通道編碼的部份我們分別使用渦輪碼(Turbo Code)以及里德所羅門碼(Reed-Solomon Codes)在資料矩陣的列與行進行編碼，以加強錯誤更正的能力。

Due to the influence of the transmission channel which degrades the quality of the video sequence. It is critical for the compressed sequences even to cause the error propagation. Forward error correction (FEC) often used to improve the effect of the error from the channel. Here we use the scalable video coding method for the video compression and unequal error protection (UEP) to different parts of the bit-stream to minimize the distortion of the error from the channel. Base on the constraint that is the transmission data rate, we should find out the optimal Reed-Solomon symbols code rates for the different parts of the sequence that minimize the distortion of the reconstruction sequence. Besides we use turbo codes and Reed Solomon codes for the channel coding. They generate parity bits for data array in horizontal and vertical direction respectively to strengthen the capability of error correcting.

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