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Communication Systems Engineering Episode 1 Part 5

Tham khảo tài liệu 'communication systems engineering episode 1 part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Eytan Modiano Slide 1 16.36 Communication Systems Engineering Lecture 5 Source Coding Eytan Modiano Source coding Source Alphabet a1.aN Encode Channel Alphabet c1.cN Source symbols - Letters of alphabet ASCII symbols English dictionary etc. - Quantized voice Channel symbols - In general can have an arbitrary number of channel symbols Typically 0 1 for a binary channel Objectives of source coding - Unique decodability - Compression Encode the alphabet using the smallest average number of channel symbols Eytan Modiano Slide 2 Compression Lossless compression - Enables error free decoding - Unique decodability without ambiguity Lossy compression - Code may not be uniquely decodable but with very high probability can be decoded correctly Eytan Modiano Slide