Recording apparatus and methods for use in forming a video disc record having spirally aligned sync storage locations
Method of and apparatus for indicating length and remaining recording capacity of a recording tape
Digital recording and reproducing apparatus for television signal
Block quantizer for transform coding
Method of reconstructing image from compression-processed image signals
Process and apparatus for digital signal coding and transmission by selective replenishment in time of a vector quantizer
Teleradiology system having multiple compressor/expanders Patent #: 4860112
ApplicationNo. 317517 filed on 03/01/1989
US Classes:386/101, Time compressing375/240.18, Transform375/240.24, Block coding386/104, Digital audio signal386/109Compressing in recording or decompressing in reproducing
ExaminersPrimary: Envall, Roy N. Jr.
Assistant: Tran, Thai
Attorney, Agent or Firm
International ClassH04N 005/76
Foreign Application Priority Data1988-03-01 JP
AbstractAn image signal recording apparatus achieves an orthogonal transform and a compression coding on image data so as to record the resultant data in a recoding medium. There is disposed a selector to select a compression ratio for the compression coding of the data, namely, the compression ratio is selectable. The selected compression ratio data is recorded in the recording medium together with the image data. A playback apparatus reads from the recording medium the compression ratio data together with the image data undergone the compression coding so as to decode the image data by use of the compression ratio data. In consequence, according to these apparatuses, the compression ratio can be arbitrarily set. In addition, the image signal recording apparatus generates recording codes associated with the amounts of the image data and the audio data so as to write the codes in the recording medium. The recording codes are read from the recording medium, so that the remaining amount of the recording medium available for the recording operation is displayed.