Apparatus and method for converting an encoding system of video stream
AssigneeHitachi, Ltd.
InventorsHironori Komi, Yusuke Yatabe, Masaru Takahashi
Life of this patent
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Abstract
An apparatus by which a user can easily set a parameter for conversion when a compression encoding system of video stream is converted is provided. A particular period in a first video stream is repeatedly reproduced to convert the reproduced portion into a second video stream in real time. At that time, the user checks the image quality after conversion on a preview screen and sets a desired conversion parameter. A local decode image is output to the preview screen. Thus, the circuit configuration is simplified.
Claims17
An apparatus for converting an encoding system of video stream which converts a first video stream recorded on a storage medium by a first compression encoding system into a second video stream using a second compression encoding system, comprising:
- a reproducer reproducing the first video stream recorded on the storage medium;
- a stream converter converting the reproduced first video stream into the second video stream;
- a conversion period designator designating a conversion period in the first video stream;
- a stream output unit outputting the converted second video stream;
- and
- a preview output unit outputting an image corresponding to a decoded image of the converted second video stream to a display device;
- said stream output unit outputting the second video stream for a period designated by the conversion period designator.
An apparatus for converting an encoding system of video stream which converts a first video stream compressed by a first compression encoding system into a second video stream using a second compression encoding system based on frame-to-frame motion compensation, comprising:
- a stream converter converting the first video stream into the second video stream;
- a stream output unit outputting the converted second video stream;
- and
- a preview output unit outputting an image corresponding to a decoded image of the converted second video stream to a display device,
- said stream converter generating a local decode image of the second video stream for frame-to-frame motion compensation;
- and
- said preview output unit outputting a local decode image generated by said stream converter as an image corresponding to the decoded image of the second video stream.
A digital signal conversion device for converting a first digital signal recorded on a storage medium by a first compression encoding system into a second digital signal using a second compression encoding system, comprising:
- a reproducer reproducing the first digital signal recorded on the storage medium;
- a signal converter converting the reproduced first digital signal into the second digital signal;
- a conversion period designator designating a conversion period in the first digital signal;
- a first output unit outputting the converted second digital signal;
- and
- a second output unit outputting a decoded signal of the converted second digital signal;
- the first output unit outputting the second digital signal for the period designated by said conversion period designator.
A digital signal conversion device for converting a first digital signal compressed by a first compression encoding system into a second digital signal using a second compression encoding system based on frame-to-frame motion compensation, comprising:
- a digital signal converter converting the first digital signal into the second digital signal;
- a first output unit outputting the converted second digital signal;
- and
- a second output unit outputting a decoded signal of the converted second digital signal;
- said digital signal converter generating a local decode signal of the second video stream for frame-to-frame motion compensation, and
- said second output unit outputting a local decode signal generated by said digital signal converter as a decoded signal of the second digital signal.
A method for converting an encoding system of video stream which converts a first video stream recorded on a storage medium using a first compression encoding system into a second video stream using a second compression encoding system, comprising:
- reproducing the first video stream recorded on the storage medium;
- designating a period for converting into the second video stream in the first video stream;
- converting the first video stream of the designated period into the second video stream;
- displaying an image corresponding to a decoded image of the converted second video stream;
- and
- outputting the converted second video stream for the designated period after displaying the image.
Dependencies are inferred from the claim text.