DSP Blockset

Frame Rebuffering

Buffering operations provide another mechanism for rate changes in DSP models. The purpose of many buffering operations is to adjust the frame size of the signal, M, without altering the sequence sample rate T_s. This usually results in a change to the signal's frame rate, T_f, according to the relation

However, this is only true when the original signal is preserved in the buffering operation, with no samples added or deleted. Buffering operations that generate overlapping frames, or that only partially unbuffer frames, alter the data sequence by adding or deleting samples. In such cases, the above relation is not valid.

Buffering Blocks.   The following table lists the principal buffering blocks in the DSP Blockset.

Block	Library
Buffer	Signal Management / Buffers
Delay Line	Signal Management / Buffers
Unbuffer	Signal Management / Buffers
Variable Selector	Signal Management / Indexing
Zero Pad	Signal Operations

The following sections discuss two general classes of buffering operations:

• Buffering with Preservation of the Signal
• Buffering with Alteration of the Signal

Example: Rate Conversion by Frame-Size Adjustment

Buffering with Preservation of the Signal