Image encoding method and image decoding method
An example image decoding apparatus and method involves acquiring encoded data including an image code sequence corresponding to a slice of a plurality of slices obtained by dividing a picture of a moving image and first timing information indicating a first time at which the slice is to be decoded and no underflow or overflow occurs in a first virtual reception buffer from which the image code sequence is output in a slice unit. The image code sequence is decoded on the basis of the first timing information.
1. An image decoding apparatus comprising:
a receiver that receives encoded data comprising an image code sequence corresponding to a slice of a plurality of slices obtained by dividing a picture of a moving image and first timing information indicating a first time at which the slice is to be decoded and no underflow or overflow occurs in a first virtual reception buffer from which the image code sequence is output in a slice unit; and
a decoder that decodes the image code sequence on the basis of the first timing information.
2. The apparatus according to claim 1 , wherein a data amount of the image code sequence corresponding to the slice is controlled on the basis of first buffer size information of the first virtual reception buffer from which the image code sequence corresponding to the slice is output in a slice unit.
3. The apparatus according to claim 1 , wherein the encoded data further comprises second timing information indicating a second time at which the picture is to be decoded and no underflow or overflow occurs in a second virtual reception buffer from which the image code sequence is output in a picture unit.
4. The apparatus according to claim 3 , wherein a data amount of the image code sequence corresponding to the slice is controlled on the basis of second buffer size information of the second virtual reception buffer.
5. An image decoding method comprising:
receiving encoded data comprising an image code sequence corresponding to a slice of a plurality of slices obtained by dividing a picture of a moving image and first timing information indicating a first time at which the slice is to be decoded and no underflow or overflow occurs in a first virtual reception buffer from which the image code sequence is output in a slice unit; and
decoding the image code sequence on the basis of the first timing information.
6. The method according to claim 5 , wherein a data amount of the image code sequence corresponding to the slice is controlled on the basis of first buffer size information of the first virtual reception buffer from which the image code sequence corresponding to the slice is output in a slice unit.
7. The method according to claim 5 , wherein the encoded data further comprises second timing information indicating a second time at which the picture is to be decoded and no underflow or overflow occurs in a second virtual reception buffer from which the image code sequence is output in a picture unit.
8. The method according to claim 7 , wherein a data amount of the image code sequence corresponding to the slice is controlled on the basis of second buffer size information of the second virtual reception buffer.
9. An image decoder comprising:
a memory; and
a control device accessing the memory to execute a program so as to perform operations comprising:
receiving encoded data comprising an image code sequence corresponding to a slice of a plurality of slices obtained by dividing a picture of a moving image and first timing information indicating a first time at which the slice is to be decoded and no underflow or overflow occurs in a first virtual reception buffer from which the image code sequence is output in a slice unit; and
decoding the image code sequence on the basis of the first timing information.
10. The image decoder according to claim 9 , wherein a data amount of the image code sequence corresponding to the slice is controlled on the basis of first buffer size information of the first virtual reception buffer from which the image code sequence corresponding to the slice is output in a slice unit.
11. The image decoder according to claim 9 , wherein the encoded data further comprises second timing information indicating a second time at which the picture is to be decoded and no underflow or overflow occurs in a second virtual reception buffer from which the image code sequence is output in a picture unit.
12. The image decoder according to claim 11 , wherein a data amount of the image code sequence corresponding to the slice is controlled on the basis of second buffer size information of the second virtual reception buffer.