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| The present invention is embodied in a record medium for recording a specially-formatted composite ... |
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| Circuit for reducing intermodulation distortion in a frequency-modulated signal |
| Accordingly, it is a general object of the present invention to provide a novel and useful ... |
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| Video matte generator |
| p A preferred embodiment of the present invention is a matte generator for generating a video ... |
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| Jitter correction circuit |
| A primary object of the present invention is to provide a jitter correction circuit of a relatively ... |
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| Motion detection between even and odd fields within 2:1 interlaced television standard |
| A general object of the present invention is to provide a method and apparatus for detecting images ... |
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| Method and apparatus for capturing video images |
| The present invention provides method and apparatus for acquiring video signals having different ... |
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| Ghost-cancelation reference signal acquisition circuitry, as for TV receiver or video recorder |
| OF PREFERRED EMBODIMENTS The term "television set" is used in this specification to describe a ... |
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| Time base correction of color video signal from playback apparatus |
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| Color synchronizing circuit |
| Briefly described, the present invention comprises a color synchronizing circuit including a phase ... |
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| Speech scrambler |
| In view of the above shortcomings of the prior art, an object of the present invention is to ... |
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Video signal encoding method
| Details |
Inventors: Kato, Motoki; Kojima, Takashi;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Tran; Thai
Assistant Examiner:
Attorney, Agent or Firm: Frommer; William S., Sinderbrand; Alvin
A method for encoding video signals including a first step of generating the information on picture characteristics at least including the luminance information of the input video signals in terms of a pre-set time interval as a unit, a second step of calculating the mean bit rate of the input video signals, a third step of calculating the information on the amount of bits generated per pre-set time interval of the input video signals, a fourth step of calculating the encoding difficulty per pre-set time interval based upon the information on picture characteristics, information on the amount of generated bits and the information on the total amount of usable data, a fifth step of determining the encoding bit rate per pre-set time interval by applying the encoding difficulty to a function for finding the encoding bit rate pre-set by the mean bit rate and a sixth step of encoding the input video signals in accordance with the encoding bit rate obtained per said pre-set time interval. |
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DETAILED DESCRIPTION It is therefore an object of the present invention to provide a signal encoding method, a signal encoding apparatus and a signal recording medium in which encoded data of uniform and superior quality may be produced, longtime recording may be achieved and input signals may be encoded substantially on the real-time basis.
It is another object of the present invention to provide a signal encoding method, a signal encoding apparatus and a signal recording medium in which input video signals may be encoded in such a manner as to reflect characteristics of the visual sense of the human being and to render the encoding noise less apparent.
According to the present invention, there is provided a method for encoding video signals including a first step of generating the information on picture characteristics at least including the luminance information of the input video signals per a pre-set time interval as a unit, a second step of calculating the mean bit rate of the input video signals, a third step of calculating the information on the amount of bits generated per pre-set time interval of the input video signals, a fourth step of calculating the encoding difficulty per pre-set time interval based upon the information on picture characteristics, information on the amount of generated bits and the information on the total amount of data usable for transmission of encoded data, a fifth step of determining the encoding bit rate per pre-set time interval by applying the encoding difficulty to a function designed for finding the encoding bit rate pre-set by the mean bit rate, and a sixth step of encoding the input video signals in accordance with the encoding bit rate obtained per pre-set time interval.
The information on the amount of generated bits is found based upon the amount of data per pre-set time interval of the encoded data generated by encoding at least a part of the input video signals.
The information on picture characteristics is found by calculating at least one of picture luminance, chromaticity, flatness and picture movement every pre-set time interval
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TV Signal 
