High-level constraints for transform skip blocks in video coding

A device for decoding video data, the device comprising:

• memory configured to store the video data;
• and
• one or more processors implemented in circuitry and coupled to the memory, the one or more processors being configured to:
• receive a first slice header syntax element for a slice of the video data;
• determine a first value for the first slice header syntax element, wherein the first value is indicative of whether dependent quantization is enabled for the slice;
• receive a second slice header syntax element for the slice of the video data;
• determine a second value for the second slice header syntax element, wherein the second value is indicative of whether sign data hiding is enabled for the slice;
• determine whether transform skip residual coding is disabled for the slice in response to the first value and the second value;
• wherein determining whether transform skip residual coding is disabled for the slice comprises:
• in response to the first value indicating that dependent quantization is disabled for the slice and the second value indicating that sign data hiding is disabled for the slice, receiving a third slice header syntax element indicative of whether transform skip residual coding is disabled for the slice;
• and
• decode the slice based on the determinations.

A method of encoding video data, the method comprising:

• determining whether to enable dependent quantization for a slice of the video data;
• determining whether to enable sign data hiding for the slice;
• in response to at least one of the determination of whether to enable dependent quantization for the slice or the determination of whether to enable sign data hiding for the slice, determining whether to disable transform skip residual coding for the slice;
• signaling a first slice header syntax element for the slice, wherein the first slice header syntax element has a first value that is indicative of whether dependent quantization is enabled for the slice;
• signaling a second slice header syntax element for the slice, wherein the second slice header syntax element has a second value that is indicative of whether sign data hiding is enabled for the slice;
• wherein determining whether transform skip residual coding is disabled for the slice comprises:
• in response to the first value indicating that dependent quantization is disabled for the slice and the second value indicating that sign data hiding is disabled for the slice, receiving a third slice header syntax element indicative of whether transform skip residual coding is disabled for the slice;
• and
• encoding the slice based on the determinations.

A device for encoding video data, the device comprising:

• memory configured to store the video data;
• and
• one or more processors implemented in circuitry and coupled to the memory, the one or more processors being configured to:
• determine whether to enable dependent quantization for a slice of the video data;
• determine whether to enable sign data hiding for the slice;
• in response to at least one of the determination of whether to enable dependent quantization for the slice or the determination of whether to enable sign data hiding for the slice, determine whether to disable transform skip residual coding for the slice;
• signal a first slice header syntax element for the slice, wherein the first slice header syntax element has a first value that is indicative of whether dependent quantization is enabled for the slice;
• and
• signal a second slice header syntax element for the slice, wherein the second slice header syntax element has a second value that is indicative of whether sign data hiding is enabled for the slice;
• wherein determining whether transform skip residual coding is disabled for the slice comprises:
• in response to the first value indicating that dependent quantization is disabled for the slice and the second value indicating that sign data hiding is disabled for the slice, receiving a third slice header syntax element indicative of whether transform skip residual coding is disabled for the slice;
• and
• encode the slice based on the determinations.