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DSP pioneer Bede Liu died at 91; a Princeton professor whose foundational work underpins modern digital signal processing, low-power processors, and widely used multimedia tech, with a prolific output and a notable shift into media integrity and watermarking standards.

Bede Liu, DSP pioneer and Princeton professor, died at 91; his foundational work enabled modern mobile, streaming, and multimedia tech, with 250 papers, 12 patents, and 53 PhD students, plus IEEE Kilby Medal honors and impactful teaching.