TDA2EXEVM: what's the meaning of "pitch" in TIDL?

ZhangQiang

Part Number: TDA2EXEVM

There are some params about "pitch":

uint16_t inPitch;
uint16_t outPitch;
uint16_t outPitchPooling;
uint32_t inChPitch;
uint32_t outChPitch;
uint32_t outChPitchPooling;

is it means data with pad?

if the input data is 1x3x512x1024(batch, channel, height, width), then the value of "pitch"?

I am NOT sure if the input data and output data of the layers is in order of w, h, c, b ? and with no pad?

over 7 years ago

0 Yordan Kamenov over 7 years ago

TI__Mastermind 42515 points

Hi,

I have forwarded your question to TIDL expert.

Regards,
Yordan

0 kumar.desappan over 7 years ago

TI__Mastermind 22145 points

Hi Zhang,

Your understanding of batch, channel, height, width order is right. In this example case, all the 1024 features (A line of feature) continuously placed in the memory and the 512 such 1024 features (lines) ans so on.

Regarding pitch, it is byte offset between each lines of feature maps. In this case offset between first and second 1024 features in the memory. This includes the padding data and any other memory alignment related offsets.

Similarly, the ChPitch is byte offset between each channel of feature maps.

Hope this clarifies all your quires regarding pitch.

Thanks and Rgerads,.

Kumar.D

0 ZhangQiang over 7 years ago in reply to kumar.desappan

Intellectual 415 points

yes, thanks !

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TDA2EXEVM: what's the meaning of "pitch" in TIDL?