Methods for error concealment due to enhancement layer packet loss in scalable video coding (SVC) decoding

A method of decoding a digital video signal transmitted in first and second layers, wherein the second layer comprises information for enhancing video of the first layer, the method comprising:

• generating at least one first layer frame by decoding information in the first layer;
• detecting an error in the second layer;
• and
• generating a plurality of output frames by up-sampling corresponding first layer frames,
• wherein:
• the digital video signal includes a plurality of groups of pictures, wherein each group of pictures ends with a key frame,
• the error in the second layer occurs at least two frames before the key frame and is followed by at least one second layer frame with no error which precedes the key frame, and
• the step of generating a plurality of output frames includes up-sampling those first layer frames corresponding to the second layer frames containing the error and to all second layer frames which follow the frame containing the error and which precede the key frame of the group of pictures in which the error is detected.