def METHOD_NAME(new_bound_idxs, old_bound_idxs, old_labels, N):
    """Synchronizes the labels from the old_bound_idxs to the new_bound_idxs.
    Parameters
    ----------
    new_bound_idxs: np.array
        New indeces to synchronize with.
    old_bound_idxs: np.array
        Old indeces, same shape as labels + 1.
    old_labels: np.array
        Labels associated to the old_bound_idxs.
    N: int
        Total number of frames.
    Returns
    -------
    new_labels: np.array
        New labels, synchronized to the new boundary indeces.
    """
    assert len(old_bound_idxs) - 1 == len(old_labels)
    # Construct unfolded labels array
    unfold_labels = np.zeros(N)
    for i, (bound_idx, label) in enumerate(
            zip(old_bound_idxs[:-1], old_labels)):
        unfold_labels[bound_idx:old_bound_idxs[i + 1]] = label
    # Constuct new labels
    new_labels = np.zeros(len(new_bound_idxs) - 1)
    for i, bound_idx in enumerate(new_bound_idxs[:-1]):
        new_labels[i] = np.median(
            unfold_labels[bound_idx:new_bound_idxs[i + 1]])
    return new_labels