Paper details

[lovelyczli]

Thanks for your impressive work!
Q1: About the standard contrastive loss in Equation.9
If I am right, the loss is just the crossentropyloss? Sorry, I am a new learner!
Q2: About the details in Equation.11
You regard $q_c^n$ as the ground-truth object labels. If I am right, $q_c^n$ is the top N objects predicted by BiT? And you cannot provide the hand-marked or true labels in the paper.
I am very confused between Equation.10 and Equation.11. If I am right, the Equation.10 computes the crossentropyloss of similarity score in video level($x_{vo} + x_{ov}$ with Z), but the Equation.11 computes in object level? i cannot get the idea and the meaning of
the subscript c in Equation.11
Looking forward to your reply~