While the described ink pad can include any suitable component, in some cases it includes a lid, a base, and an absorbent material. Additionally, in some cases, the lid and the base define a cavity that houses the absorbent material and the lid and the base each comprise one or more magnets and/or magnetic materials that are configured to magnetically couple with each other to releasably couple the lid and base together. In some instances, the ink pad further includes one or more seals that are configured to extend between the base and lid to limit air movement into the cavity when the lid and base are coupled together in a closed position. Additional implementations are described herein.

A covering assembly is disposed on an inked printing assembly of a stamp. The covering assembly has a top cover and a bottom cover. The top cover is detachably disposed above the inked printing assembly. The bottom cover is detachably disposed below the inked printing assembly, is located below the top cover at a spaced interval, and has a bottom wall. The covering assembly can assist in assembling the inked printing assembly. The disposition of the top cover and the bottom cover can transfer pointed force into planar force for increasing a contact area, the forcing uniformity, and the assembly convenience.

While the described ink pad can include any suitable component, in some cases it includes a lid, a base, and an absorbent material. Additionally, in some cases, the lid and the base define a cavity that houses the absorbent material and the lid and the base each comprise one or more magnets and/or magnetic materials that are configured to magnetically couple with each other to releasably couple the lid and base together. In some instances, the ink pad further includes one or more seals that are configured to extend between the base and lid to limit air movement into the cavity when the lid and base are coupled together in a closed position. Additional implementations are described herein.

While the described ink pad can include any suitable component, in some cases it includes a lid, a base, and an absorbent material. Additionally, in some cases, the lid and the base define a cavity that houses the absorbent material and the lid and the base each comprise one or more magnets and/or magnetic materials that are configured to magnetically couple with each other to releasably couple the lid and base together. In some instances, the ink pad further includes one or more seals that are configured to extend between the base and lid to limit air movement into the cavity when the lid and base are coupled together in a closed position. Additional implementations are described herein.

A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.

A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.

A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.

A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.

A positioning device for an ink pad container has a body and two elastic sheets. The two elastic sheets are respectively formed on two lateral side surfaces of the body. Each one of the two elastic sheets has an arm and a positioning protrusion. The arm is formed on a corresponding one of the two lateral side surfaces of the body, and is inserted into a corresponding one of two through grooves of the body. The positioning protrusion is formed on an inner side surface of the arm and is inserted into the body. An ink pad container may be firmly positioned into the body by the two elastic sheets. The tolerance allowances of the positioning device and the ink pad container are increased by the resiliences of the two elastic sheets. The positioning device can simultaneously satisfy the requirements for ease in assembly and for the positioning stability.

A method is provided for extending the frequency band of an audio signal during a decoding or improvement process. The method includes obtaining the decoded signal in a first frequency band, referred to as a low band. Tonal components and a surround signal are extracted from the signal from the low-band signal, and the tonal components and the surround signal are combined by adaptive mixing using energy-level control factors to obtain an audio signal, referred to as a combined signal. The low-band decoded signal before the extraction step or the combined signal after the combination step are extended over at least one second frequency band which is higher than the first frequency band. Also proved are a frequency-band extension device which implements the described method and a decoder including a device of this type.