 Signal recorder with deferred recording |
| What is claimed is: 1. An audio/visual signal recorder for recording an episode of a first audio/... |
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| Summary frames in video |
| It is therefore an object of the present invention to provide summary frame windows on the screen ... |
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| Apparatus and method for controlling the recording of television programs |
| To achieve the object of the present invention, the present invention provides the electronic ... |
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| Digital broadcast receiver outputting video and program information |
| Therefore, it is a primary object of this invention to provide a digital broadcast receiver which ... |
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| Device and method for displaying broadcast program guide in a programmed recording system |
| The object of the present invention is to provide a broadcast program guide displaying device and ... |
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| Reproducing method and apparatus |
| It is therefore an object of the present invention to provide a reproducing method and apparatus in ... |
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| Video processing circuit |
| A video input is received by the composite video to Y/C splitter which provides the luminance ... |
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| Optical absorbance meter |
| It is an object of the present invention to provide an optical absorbance meter having a simple ... |
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| Providing data to applications from an access system |
| The present invention, roughly described, includes an access system that provides data to resources ... |
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Coding device, coding method, program and recording medium
| Details |
Inventors: Katayama, Takashi; Nishio, Kosuke; Matsumoto, Masaharu; Kawamura, Akihisa; Fujita, Takeshi; Sueyoshi, Masahiro; Abe, Kazutaka;
Assignee: Matsushita Electric Industrial Co., Ltd. (Kadoma, JP)
Primary Examiner: Tran; Thai
Assistant Examiner: Dunn; Mishawn
Attorney, Agent or Firm: Renner, Otto, Boisselle & Sklar, LLP
A coding device includes: a decoder for decoding a first stream signal in which a first video stream including a first video stream information generated by coding a first video signal and a first audio stream including a first audio stream information generated by coding a first audio signal are multiplexed; and a re-encoder for generating, based on the decoded first stream signal, a second video stream including a second video stream information having a bit rate lower than the first video stream information and a second audio stream including a second audio stream information having a bit rate lower than the first audio stream information, and multiplexing the second video stream is and the second audio stream to generate a second stream signal. |
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DETAILED DESCRIPTION According to one aspect of the present invention, there is provided a coding device including: a decoder for decoding a first stream signal in which a first video stream including a first video stream information generated by coding a first video signal and a first audio stream including a first audio stream information generated by coding a first audio signal are multiplexed and a re-encoder for generating, based on the decoded first stream signal, a second video stream including a second video stream information having a bit rate lower than the first video stream information and a second audio stream including a second audio stream information having a bit rate lower than the first audio stream information, and multiplexing the second video stream and the second audio stream to generate a second stream signal.
In one embodiment of the invention, the first audio stream information is obtained by performing a time-frequency conversion on the first audio signal into a frequency domain signal to quantize the frequency domain signal: the re-encoder calculates psychoacoustic model information indicating frequency bands of the first audio signal masked by auditory characteristics; and the re-encoder converts, based on the psychoacoustic model information, the first audio stream information into the second audio stream information having a bit rate lower than the first audio stream information to generate the second audio stream.
In one embodiment of the invention, the quantization of the frequency domain signal is performed to indicate frequency spectrums for respective frequency bands of the frequency domain signal by mantissa parts and exponent parts; each of the exponent parts is a scale factor of each of the frequency spectrums for the respective frequency bands; the re-encoder calculates the psychoacoustic model information based on the scale factors of the frequency spectrums for the respective frequency bands included in the quantized frequency information; and the re-encoder converts the first audio stream information into the second audio stream information having a bit rate lower than the first audio stream information by reallocating, based on the psychoacoustic model information, the number of bits allocated to the mantissa parts
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TV Signal 
