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Method and apparatus for processing a media signal

Method and apparatus for processing a media signal description/claims

The present invention relates to an apparatus for processing a media signal and method thereof, and more particularly to an apparatus for generating a surround signal by using spatial information of the media signal and method thereof.

Generally, various kinds of apparatuses and methods have been widely used to generate a multi-channel media signal by using spatial information for the multi-channel media signal and a downmix signal, in which the downmix signal is generated by downmixing the multi-channel media signal into mono or stereo signal.

However, the above methods and apparatuses are not usable in environments unsuitable for generating a multi-channel signal. For instance, they are not usable for a device capable of generating only a stereo signal. In other words, there exists no method or apparatus for generating a surround signal, in which the surround signal has multi-channel features in the environment incapable of generating a multi-channel signal by using spatial information of the multi-channel signal.

So, since there exists no method or apparatus for generating a surround signal in a device capable of generating only a mono or stereo signal, it is difficult to process the media signal efficiently.

Accordingly, the present invention is directed to an apparatus for processing a media signal and method thereof that substantially obviate one or more of the problems due to limitations and disadvantages of the related art.

An object of the present invention is to provide an apparatus for processing a media signal and method thereof, by which the media signal can be converted to a surround signal by using spatial information for the media signal.

Additional features and advantages of the invention will be set forth in a description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

To achieve these and other advantages and in accordance with the purpose of the present invention, a method of processing a signal according to the present invention includes of: generating source mapping information corresponding to each source of multi-sources by using spatial information indicating features between the multi-sources; generating sub-rendering information by applying filter information giving a surround effect to the source mapping information per the source; generating rendering information for generating a surround signal by integrating at least one of the sub-rendering information; and generating the surround signal by applying the rendering information to a downmix signal generated by downmixing the multi-sources.

To further achieve these and other advantages and in accordance with the purpose of the present invention, an apparatus for processing a signal includes a source map ping unit generating source mapping information corresponding to each source of multi-sources by using spatial information indicating features between the multi-sources; a sub-rendering information generating unit generating sub-rendering information by applying filter information having a surround effect to the source mapping information per the source; an integrating unit generating rendering information for generating a surround signal by integrating the at least one of the sub-rendering information; and a rendering unit generating the surround signal by applying the rendering information to a downmix signal generated by downmixing the multi-sources.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

A signal processing apparatus and method according to the present invention enable a decoder, which receives a bitstream including a downmix signal generated by downmixing a multi-channel signal and spatial information of the multi-channel signal, to generate a signal having a surround effect in environments in incapable of recovering the multi-channel signal.

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

In the drawings:

• Provisional Patent
• Utility Patent

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