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High efficiency encoding device and a noise spectrum modifying d

Pulse or digital communications – Pulse code modulation – Correcting or reducing quantizing errors
Patent

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High efficiency speech coding apparatus and transit switching sy

Pulse or digital communications – Pulse code modulation
Patent

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High speed communications system for analog subscriber connectio

Pulse or digital communications – Pulse code modulation
Patent

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High speed communications system for analog subscriber connectio

Pulse or digital communications – Pulse code modulation – Noise or distortion reduction
Patent

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High speed communications system for analog subscriber...

Pulse or digital communications – Pulse code modulation
Reexamination Certificate

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High speed encoding and decoding methods for analog...

Pulse or digital communications – Pulse code modulation
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High speed leading or trailing bit value detection

Pulse or digital communications – Pulse code modulation
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High-speed interconnection adapter having automated crossed...

Pulse or digital communications – Pulse code modulation – Differential
Reexamination Certificate

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