Gradient Descent Update Equation
3 explanations from your library.
10:14IIT Madras (NPTEL)
Gradient Descent Variants and Momentum
“so this is the update. Update is your gradient with respect to the parameters multiplied by the alpha which is”
20:09IIT Madras (NPTEL)
Learning Rate Decay
“Epoch is when you have gone through your entire data set, epoch is when you have gone through your entire data set once, that is one epoch, right. Let us say you are using stochastic gradient descent or mini batch gradient descent, you have to run through your entire data set and that would be considered as one epoch.”
Closest moment in this session: it teaches the idea without listing it as a key concept.
30:30Prof. Prabir Kumar Biswas, IIT Kharagpur
From AdaGrad to RMSProp
“sum of the squares of the past gradients where this past gradient starts from time t equal to 0, ok. So, you are basically the operation that was done in Adagrad algorithm is r t”
Closest moment in this session: it teaches the idea without listing it as a key concept.
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Compare reel
3 explanations of this concept, from different sessions, spliced into one video with fl_splice. Each clip is labelled with its speaker.
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- so_13.4
- starts at 13.4 s · and 5 more like it
- eo_26.3
- ends at 26.3 s · and 5 more like it
- w_1280
- 1280 px wide · and 2 more like it
- h_720
- 720 px tall · and 2 more like it
- c_fill
- crops to fill the frame exactly · and 2 more like it
- l_video:pravaha:2b17046e-fb…
- another video (pravaha/2b17046e-fb2d-4a2c-ad2c-e84a76f8c28a) as a layer
- fl_splice
- joins the next clip onto the end of this one · and 1 more like it
- fl_layer_apply
- places the layer defined just before · and 4 more like it
- l_video:pravaha:1ba747ae-bd…
- another video (pravaha/1ba747ae-bdb0-43b5-bd11-8a0eda32a02c) as a layer
- l_text:arial_34_bold:1%20%C…
- text layer “1 · IIT Madras (NPTEL)” · and 2 more like it
- co_white
- text colour white · and 2 more like it
- b_rgb:0f766ecc
- background #0f766ecc · and 2 more like it
- g_north_west
- anchored to the top-left corner · and 2 more like it
- x_40
- 40 px from the side · and 2 more like it
- y_40
- 40 px from the edge · and 2 more like it
- f_auto:video
- best format for each device (e.g. AV1, WebM, MP4, WebP)
- q_auto
- AI-chosen quality: smallest file that still looks right
Explanation thumbnail
The frame at that moment, cropped around the speaker by AI.
…/video/upload/so_14.9,c_fill,ar_16:9,w_640,g_auto/f_auto,q_auto/pravaha/ff2c7367-5718-4b86-9d17-04328cf12206.jpg
- so_14.9
- starts at 14.9 s
- c_fill
- crops to fill the frame exactly
- ar_16:9
- aspect ratio 16 : 9
- w_640
- 640 px wide
- g_auto
- AI picks the focus (the speaker or slide), not a blind centre crop
- f_auto
- best format for each device (e.g. AV1, WebM, MP4, WebP)
- q_auto
- AI-chosen quality: smallest file that still looks right
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