Device and method for decoding video data using maximum bit-depth constraint information

1. A method of decoding a bitstream by an electronic device, the method comprising:

receiving the bitstream; and

determining, from the bitstream, a maximum constraint indication used for determining a maximum value of a bit-depth indication sps_bitdepth_minus8 included in a sequence parameter set (SPS) of the bitstream when the maximum constraint indication is a maximum bit-depth constraint indication,

wherein the maximum constraint indication does not impose a constraint on the maximum value of the bit-depth indication sps_bitdepth_minus8 when the maximum constraint indication is equal to zero.

2. The method according to claim 1 , wherein a value of the maximum bit-depth constraint indication is in a range of zero to eight.

3. The method according to claim 1 , wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by the maximum constraint indication and a constant value when the maximum constraint indication is greater than zero.

4. The method according to claim 3 , wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by subtracting the constant value from the maximum constraint indication when the maximum constraint indication is greater than zero.

5. An electronic device for decoding a bitstream, the electronic device comprising:

at least one processor; and

at least one storage device coupled to the at least one processor and storing a plurality of computer-executable instructions which, when executed by the at least one processor, cause the electronic device to:

receive the bitstream; and

determine, from the bitstream, a maximum constraint indication used for determining a maximum value of a bit-depth indication sps_bitdepth_minus8 included in a sequence parameter set (SPS) of the bitstream when the maximum constraint indication is a maximum bit-depth constraint indication,

wherein the maximum constraint indication does not impose a constraint on the maximum value of the bit-depth indication sps_bitdepth_minus8 when the maximum constraint indication is equal to zero.

6. The electronic device according to claim 5 , wherein a value of the maximum bit-depth constraint indication is in a range of zero to eight.

7. The electronic device according to claim 5 , wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by the maximum constraint indication and a constant value when the maximum constraint indication is greater than zero.

8. The electronic device according to claim 7 , wherein the maximum value of the bit-depth indication sps_bitdepth_minus8 is calculated by subtracting the constant value from the maximum constraint indication when the maximum constraint indication is greater than zero.

9. A method of decoding a bitstream by an electronic device, the method comprising:

receiving the bitstream;

determining, from a sequence parameter set (SPS) of the bitstream, a bit-depth indication sps_bitdepth_minus8 indicating a bit-depth parameter of a plurality of image frames in a video sequence; and

determining, from the bitstream, a maximum bit-depth constraint indication,

wherein the maximum bit-depth constraint indication does not impose a constraint on the bit-depth indication sps_bitdepth_minus8 when the maximum bit-depth constraint indication is equal to zero.

10. The method according to claim 9 , wherein a maximum value of the bit-depth indication sps_bitdepth_minus8 is determined based on the maximum bit-depth constraint indication when the maximum bit-depth constraint indication is greater than zero.