Scalable audio encoding and decoding apparatus, method, and medium
First Claim
1. A scalable encoding apparatus comprising:
- a scalable encoder to encode a base layer, a first enhancement layer, and a second enhancement layer in a frame having the base layer; and
an encoding frame generator to generate an encoded frame by synthesizing the encoded results,wherein the base layer comprises higher bits among bits by which data belonging to a low frequency band of the frame is represented, the second enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to the low frequency band of the frame is represented, the first enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to a high frequency band of the frame is represented, a division direction of the second enhancement layer is determined on a basis of a distribution pattern of data belonging to the second enhancement layer, and the second enhancement layer is divided into a plurality of layers according to the determined division direction, andwherein the determined division direction is a horizontal direction or a vertical direction.
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Abstract
Provided is a scalable encoding method, apparatus, and medium. The method includes: encoding a base layer and encoding a first enhancement layer and a second enhancement layer in a frame having the base layer; and generating an encoded frame by synthesizing the encoded results. Accordingly, only if the loss of the encoding frame is not as great as the encoded first enhancement layer is damaged, a case where speech restoration with respect to partial frequency bands must be given up does not occur. Furthermore, since an encoder divides the second enhancement layer into a plurality of layers in a horizontal or vertical direction, considering a distribution pattern of data belonging to the second enhancement layer and first encodes a layer in which lots of data are distributed among the divided layers, loss of audio information can be minimized even if a portion of the encoded second enhancement layer is damaged.
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Citations
24 Claims
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1. A scalable encoding apparatus comprising:
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a scalable encoder to encode a base layer, a first enhancement layer, and a second enhancement layer in a frame having the base layer; and an encoding frame generator to generate an encoded frame by synthesizing the encoded results, wherein the base layer comprises higher bits among bits by which data belonging to a low frequency band of the frame is represented, the second enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to the low frequency band of the frame is represented, the first enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to a high frequency band of the frame is represented, a division direction of the second enhancement layer is determined on a basis of a distribution pattern of data belonging to the second enhancement layer, and the second enhancement layer is divided into a plurality of layers according to the determined division direction, and wherein the determined division direction is a horizontal direction or a vertical direction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A scalable encoding method comprising:
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encoding, using at least one processing device, a base layer, a first enhancement layer, and a second enhancement layer in a frame having the base layer; and generating an encoded frame by synthesizing the encoded results, wherein the base layer comprises higher bits among bits by which data belonging to a low frequency band of the frame is represented, the second enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to the low frequency band of the frame is represented, the first enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to a high frequency band of the frame is represented, a division direction of the second enhancement layer is determined on a basis of a distribution pattern of data belonging to the second enhancement layer, and the second enhancement layer is divided into a plurality of layers according to the determined division direction, and wherein the determined division direction is a horizontal direction or a vertical direction. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A scalable decoding apparatus comprising:
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an encoding frame divider to divide an encoded frame into a base layer, a first enhancement layer, and a second enhancement layer; and a scalable decoder to decode the base layer, the first enhancement layer, and the second enhancement layer, wherein the base layer comprises higher bits among bits by which data belonging to a low frequency band of the frame is represented, the second enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to the low frequency band of the frame is represented, the first enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to a high frequency band of the frame is represented, a division direction of the second enhancement layer is determined on a basis of a distribution pattern of data belonging to the second enhancement layer, and the second enhancement layer is divided into a plurality of layers according to the determined division direction, and wherein the determined division direction is a horizontal direction or a vertical direction. - View Dependent Claims (16, 17, 18)
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19. A scalable decoding method comprising:
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dividing an encoded frame into a base layer, a first enhancement layer, and a second enhancement layer; and decoding, using at least one processing device, the base layer, the first enhancement layer, and the second enhancement layer, wherein the base layer comprises higher bits among bits by which data belonging to a low frequency band of the frame is represented, the second enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to the low frequency band of the frame is represented, the first enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to a high frequency band of the frame is represented, a division direction of the second enhancement layer is determined on a basis of a distribution pattern of data belonging to the second enhancement layer, and the second enhancement layer is divided into a plurality of layers according to the determined division direction, and wherein the determined division direction is a horizontal direction or a vertical direction. - View Dependent Claims (20, 21, 22)
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23. At least one computer readable medium storing instructions that control at least one processor to perform a scalable encoding method comprising:
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encoding a base layer, a first enhancement layer, and a second enhancement layer in a frame having the base layer; and generating an encoded frame by synthesizing the encoded results, wherein the base layer comprises higher bits among bits by which data belonging to a low frequency band of the frame is represented, the second enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to the low frequency band of the frame is represented, the first enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to a high frequency band of the frame is represented, a division direction of the second enhancement layer is determined on a basis of a distribution pattern of data belonging to the second enhancement layer, and the second enhancement layer is divided into a plurality of layers according to the determined division direction, and wherein the determined division direction is a horizontal direction or a vertical direction.
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24. At least one computer readable medium storing instructions that control at least one processor to perform a scalable decoding method comprising:
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dividing an encoded frame into a base layer, a first enhancement layer, and a second enhancement layer; and decoding the base layer, the first enhancement layer, and the second enhancement layer, wherein the base layer comprises higher bits among bits by which data belonging to a low frequency band of the frame is represented, the second enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to the low frequency band of the frame is represented, the first enhancement layer comprises lower bits other than the higher bits among bits by which data belonging to a high frequency band of the frame is represented, a division direction of the second enhancement layer is determined on a basis of a distribution pattern of data belonging to the second enhancement layer, and the second enhancement layer is divided into a plurality of layers according to the determined division direction, and wherein the determined division direction is a horizontal direction or a vertical direction.
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Specification