KR-20260065523-A - ENCODER AND DECODER FOR LOSSLESS CODING OF SINGAL AND METHOD FOR OPERATING THE SAME

Abstract

An encoder and a decoder for lossless coding of a signal and a method of operation thereof are disclosed. The method of operation of the disclosed decoder includes the operation of acquiring a bitstream that has encoded an original signal; the operation of determining a first signal corresponding to a local signal that has encoded and decoded the original signal from the bitstream and a second signal corresponding to a residual signal based on the difference between the original signal and the local signal; the operation of decoding the first signal to determine the local signal; the operation of decoding the second signal to determine the residual signal; and the operation of determining the original signal based on the local signal and the residual signal.

Inventors

• 조병호
• 박수영
• 성종모
• 백승권
• 강정원
• 임우택
• 장인선

Assignees

• 한국전자통신연구원

Dates

Publication Date

20260508

Application Date

20251023

Priority Date

20241101

Claims (1)

1. In the method of operation of the decoder, Operation of acquiring a bitstream encoded from the original signal; An operation to determine a first signal corresponding to a local signal encoded and decoded from the original signal from the bitstream, and a second signal corresponding to a residual signal based on the difference between the original signal and the local signal; Decoding the first signal to determine the local signal; The operation of decoding the second signal to determine the residual signal; and Operation of determining the original signal based on the local signal and the residual signal including Method of operation of the decoder.

Description

Encoder and Decoder for Lossless Coding of Signal and Method for Operating the Same The following disclosure relates to an encoder and a decoder for lossless coding of a signal and a method of operation thereof. Signal coding is a technology for compressing and transmitting signals, and various audio coding methods are being researched to efficiently compress audio signals while minimizing loss. Signal coding methods can be classified into lossy coding and lossless coding methods depending on whether signal loss occurs during the encoding and decoding processes. Entropy coding is one of the lossless data compression methods that can compress signals by utilizing the statistical characteristics of signals based on information theory. Entropy coding can utilize, for example, Huffman coding, arithmetic coding, and context-adaptive binary arithmetic coding (CABAC). The aforementioned background technology was possessed or acquired during the process of deriving the present disclosure and cannot be considered as prior art disclosed to the general public prior to the filing of the present disclosure. FIG. 1 is a drawing for explaining an encoder and a decoder according to one embodiment. FIG. 2 is a drawing for explaining an expansion module of a decoder according to one embodiment. FIG. 3 is a diagram illustrating the operations of a decoder according to one embodiment. FIG. 4 is a drawing for explaining an expansion module of an encoder according to one embodiment. FIG. 5 is a diagram illustrating the operations of an encoder according to one embodiment. FIG. 6 is a flowchart illustrating the operation method of a decoder according to one embodiment. FIG. 7 is a flowchart illustrating the operation method of an encoder according to one embodiment. FIG. 8 is a block diagram showing a decoder according to one embodiment. FIG. 9 is a block diagram showing an encoder according to one embodiment. Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, actual implementations are not limited to the specific embodiments disclosed, and the scope of this specification includes modifications, equivalents, or substitutions included in the technical concept described by the embodiments. In this document, each of the following phrases may include any one of the items listed together in the corresponding phrase, or any combination of A, B, and C, or any combination of all of them. Terms such as "A or B," "at least one of A and B," "at least one of A, B, and C," "at least one of A, B, or C," and "a combination of one or more of A, B, and C" may be used to describe various components, but these terms should be interpreted solely for the purpose of distinguishing one component from another. For example, the first component may be named the second component, and similarly, the second component may also be named the first component. When it is stated that a component is "connected" to another component, it should be understood that it may be directly connected to or coupled with that other component, or that there may be other components in between. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this specification, terms such as "comprising" or "having" are intended to specify the existence of the described features, numbers, steps, actions, components, parts, or combinations thereof, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this specification. Hereinafter, embodiments will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical components are given the same reference numeral regardless of the drawing number, and redundant descriptions thereof will be omitted. FIG. 1 is a drawing for explaining an encoder and a decoder according to one embodiment. Referring to FIG. 1, a coding system for a signal may include an encoder (110) and a decoder (120). The signal may represent continuous one-dimensional waveform data. For example, the signal may be an audio signal or a biosignal, but the embodiments are not limited thereto. Additionally, depending on the embodiment, the signal may be high-dimensional (e.g., two-dimensional, three-dimensional) waveform data. The encoder (110) can compress the input original signal to generate a bitstre