Digital video signal recording/reproducing apparatus

• US 5,237,424 A
• Filed: 07/26/1991
• Issued: 08/17/1993
• Est. Priority Date: 07/30/1990
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Juri, Tatsuro, Nishino, Masakazu, Otaka, Hideki
• Primary Examiner(s): Chin, Tommy
• Assistant Examiner(s): NGUYEN, HUY THANH
• Application Number:
  US07/736,054
• Time in Patent Office: 753 Days
• Field of Search: 358/310, 358/133, 358/134, 358/13, 358/339, 358/334, 360/33.1, 360/32
• US Class Current: 386/307
• CPC Class Codes: H04N 5/783 Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 9/8047 using transform coding

Abstract

A digital video signal is shuffled such that blocks of a luminance signal and a chrominance signal existing at a same position on an image plane are contained in a same segment recorded on a recording medium or in a plurality of segments recorded simultaneously in parallel using a plurality of channels. Thus, the luminance signal and chrominance signal being at the same position on the image plane are always obtainable simultaneously even during high-speed reproducing in a digital VTR.

Claims

1. A digital video signal recording apparatus comprising:

shuffling means, receiving an input digital video signal containing digital luminance signals and digital chrominance signals, for forming blocks of luminance signals each composed of digital luminance signals of a plurality of pixels and blocks of chrominance signals each composed of digital chrominance signals of a plurality of pixels, forming a plurality of macro-blocks each composed of predetermined blocks of luminance signals and predetermined blocks of chrominance signals, and rearranging an order of the plurality of macro-blocks;

encoding means for encoding each of the blocks of luminance signals and the blocks of chrominance signals to obtain coded blocks such that a data quantity of coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals in a predetermined number of macro-blocks is within a predetermined data quantity;

segmenting means for forming from the coded blocks segments each having a constant data quantity and containing the coded blocks obtained by coding the blocks of luminance signals and blocks of chrominance signals in said predetermined number of macro-blocks and a control data for identifying each segment; and

recording means for recording said segments on a recording medium;

wherein said shuffling means forms the plurality of macro-blocks such that coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals composed of digital luminance and chrominance signals of pixels existing at a same position on an image plane are contained in a same segment.

2. A digital video signal recording apparatus comprising:

shuffling means, receiving an input digital video signal containing digital luminance signals and digital chrominance signals, for forming blocks of luminance signals each composed of digital luminance signals of a plurality of pixels and blocks of chrominance signals each composed of digital chrominance signals of a plurality of pixels, forming from said blocks of luminance and chrominance signals a plurality of macro-blocks each composed of blocks of luminance signals and blocks of chrominance signals composed of digital luminance and chrominance signals of pixels existing at a same position on an image plane, and rearranging an order of the plurality of macro-blocks;

encoding means for encoding each of the blocks of luminance signals and the blocks of chrominance signals to obtain coded blocks such that a data quantity of coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals in a predetermined number of macro-blocks is within a predetermined data quantity;

segmenting means for forming from the coded blocks segments each having a constant data quantity and containing the coded blocks obtained by coding the blocks of luminance chrominance signals in said predetermined number of macro-blocks and a control data for identifying the each segment; and

recording means for recording said segments on a recording medium;

wherein coded blocks obtained by coding the blocks of luminance signals and blocks of chrominance signals composed of digital luminance and chrominance signals of pixels existing at a same position on the image plane are contained in a same segment and recorded in a same recording area on the recording medium.

3. A digital video signal recording and reproducing apparatus comprising:

shuffling means, receiving an input digital video signal containing digital luminance signals and digital chrominance signals, for forming blocks of luminance signals each composed of digital luminance signals of a plurality of pixels and blocks of chrominance signals each composed of digital chrominance signals of a plurality of pixels, forming from said blocks of luminance and chrominance signals a plurality of macro-blocks each composed of blocks of luminance signals and blocks of chrominance signals composed of digital luminance and chrominance signals of pixels existing at a same position on an image plane, and rearranging an order of the plurality of macro-blocks;

encoding means for encoding each of the blocks of luminance signals and the blocks of chrominance signals to obtain coded blocks such that a data quantity of coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals in a predetermined number of macro-blocks is within a predetermined data quantity;

segmenting means for forming from the coded blocks segments each having a constant data quantity and containing the coded blocks obtained by coding the blocks of luminance and chrominance signals in said predetermined number of macro-blocks and a control data for identifying each segment;

recording means for recording said segments on the recording medium;

detection means for detecting said segments recorded on the recording medium;

inverse-segmenting means for extracting the coded blocks from the segments detected by said detection means;

decoding mean for decoding the extracted coded blocks to obtain reproduced blocks of luminance signals and reproduced blocks of chrominance signals; and

inverse-shuffling means for rearranging the order of the reproduced blocks of luminance signals and the reproduced blocks of chrominance signals inversely to the rearrangement in said shuffling means to be in an original order and de-blocking the reproduced blocks of luminance and chrominance signals in the original order to obtain reproduced digital luminance and chrominance signals of the digital video signal.

4. A digital video signal recording apparatus comprising:

shuffling means, receiving an input digital video signal containing digital luminance signals and digital chrominance signals, for forming blocks of luminance signals each composed of digital luminance signals of a plurality of pixels and blocks of chrominance signals each composed of digital chrominance signals of a plurality of pixels, forming a plurality of channels of macro-blocks each composed of predetermined blocks of luminance signals and predetermined blocks of chrominance signals, and rearranging an order of the macro-blocks in each of the plurality of channels;

encoding means for encoding each of the blocks of luminance signals and the blocks of chrominance signals to obtain a plurality of channels of coded blocks such that a data quantity of coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals in a predetermined number of macro-blocks in each of the plurality of channels is within a predetermined data quantity;

segmenting means for forming from the plurality of channels of coded blocks a plurality of channels of segments each having a constant data quantity and containing the coded blocks obtained by coding the blocks of luminance and chrominance signals in said predetermined number of macro-blocks and a control data for identifying each segment; and

recording means for recording the plurality of channels of segments in parallel on the recording medium;

wherein said shuffling means forms the plurality of channels of macro-blocks such that coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals composed of digital luminance and chrominance signals of pixels existing at a same position on an image plane are contained in segments which are recorded by said recording means simultaneously in parallel on the recording medium.

5. A digital video signal recording and reproducing apparatus comprising:

shuffling means, receiving an input digital video signal containing digital luminance signals and digital chrominance signals, for forming blocks of luminance signals each composed of digital luminance signals of a plurality of pixels and blocks of chrominance signals each composed of digital chrominance signals of a plurality of pixels, forming a plurality of channels of macro-blocks each composed of predetermined blocks of luminance signals and predetermined blocks of chrominance signals, and rearranging an order of the macro-blocks in each of the plurality of channels;

encoding means for encoding each of the blocks of luminance signals and the blocks of chrominance signals to obtain a plurality of channels of coded blocks such that a data quantity of coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals in a predetermined number of macro-blocks in each of the plurality of channels is within a predetermined data quantity;

segment means for forming from the plurality of channels of coded blocks a plurality of channels of segments each having a constant data quantity and containing the coded blocks obtained by coding the blocks of luminance and chrominance signals in said predetermined number of macro-blocks and a control data for identifying each segment;

recording means for recording the plurality of channels of segments in parallel on the recording medium;

said shuffling means forming the plurality of channels of macro-blocks such that coded blocks obtained by coding blocks of luminance signals and blocks of chrominance signals composed of digital luminance and chrominance signals of pixels existing at a same position on an image plane are contained in segments which are recorded by aid recording means simultaneously in parallel on the recording medium;

detection means for detecting the plurality of channels of segments recorded on the recording medium in parallel such that the segments recorded simultaneously in parallel are detected simultaneously in parallel;

inverse-segmenting means for extracting the coded blocks from said segments detected in each of the plurality of channels;

decoding means for decoding the extracted coded blocks in each of the plurality of channels to obtain reproduced blocks of luminance signals and reproduced blocks of chrominance signals; and

inverse-shuffling means for rearranging the order of the reproduced blocks of luminance signals and the reproduced blocks of chrominance signals inversely to the rearrangement in said shuffling means to be in an original order, and de-blocking the reproduced blocks of luminance and chrominance signals in the original order to obtain reproduced digital luminance and chrominance signals of the digital video signal.