Method and an apparatus for encoding telecine-converted video data for seamless connection

• US 5,745,645 A
• Filed: 09/27/1996
• Issued: 04/28/1998
• Est. Priority Date: 09/29/1995
• 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: Hasebe, Takumi, Tsuga, Kazuhiro, Nakamura, Kazuhiko, Mizuguchi, Noboru, Mori, Yoshihiro, Yamane, Yasuhiko
• Primary Examiner(s): TRAN, THAI Q
• Application Number:
  US08/724,231
• Time in Patent Office: 578 Days
• Field of Search: 386/1, 386/45-46, 386/125-126, 386/131, 386/95, 386/109, 386/111, 386/112, 348/96-97, 348/443-444, 348/459
• US Class Current: 386/233
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/9208 involving the use of subcodes
• CPC Class Codes: H04N 5/9262 using predictive coding
• CPC Class Codes: H04N 5/9267 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 7/52 Systems for transmission of a pulse code modulated video signal with one or more other pulse code modulated signals, e.g. an audio signal or a synchronizing signal assembling of a multiplex stream by combining a video stream with other content or additional data, remultiplexing of multiplex streams, insertion of stuffing bits into the multiplex stream, assembling of a packetised elementary stream at server side H04N21/236; disassembling of a multiplex stream, remultiplexing of multiplex streams, extraction or processing of Service Information, disassembling of packetised elementary stream at client side H04N21/434
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8063 using time division multiplex of the PCM audio and PCM video signals
• CPC Class Codes: H04N 9/8066 with insertion of the PCM audio signals in the vertical blanking interval of the PCM video signal
• CPC Class Codes: H04N 9/8205 involving the multiplexing of an additional signal and the colour video signal
• CPC Class Codes: H04N 9/8227 the additional signal being at least another television signal

Abstract

A signal conversion recording method applies a signal recording method whereby a video signal converted to a frame rate greater than the frame rate of the signal source by repeating particular fields plural times is converted to an intermediate signal having a frame rate substantially equal to the frame rate of the original signal source by deleting these repeated redundant fields. This intermediate signal is compression coded to obtain the recording signal, and the recording signal is recorded to a recording medium together with a repeat first field flag RFF declaring whether a field was deleted, and a top field first flag TFF declaring which of the two fields in the each of the resulting frames is first on the time-base, wherein when plural logical recording periods are provided on a single recording medium, said video signal is converted to the recording signal so that said flags hold particular values at the start and end of each recording period.

Claims

1. A signal conversion recording method applying a signal recording method whereby

a video signal converted to a frame rate greater than the frame rate of the signal source by repeating particular fields plural times is converted to an intermediate signal having a frame rate substantially equal to the frame rate of the original signal source by deleting these repeated redundant fields,

this intermediate signal is compression coded to obtain the recording signal, and

the recording signal is recorded to a recording medium together with a repeat first field flag RFF declaring whether a field was deleted, and a top field first flag TFF declaring which of the two fields in the each of the resulting frames is first on the time-base,

wherein when plural logical recording periods are provided on a single recording medium, said video signal is converted to the recording signal so that said flags hold particular values at the start and end of each recording period.

2. A signal conversion recording apparatus whereby

a video signal converted to a frame rate greater than the frame rate of the signal source by repeating particular fields plural times is converted to an intermediate signal having a frame rate substantially equal to the frame rate of the original signal source by deleting these repeated redundant fields,

this intermediate signal is compression coded to obtain the recording signal, and

the recording signal is recorded to a recording medium together with a repeat first field-flag RFF declaring whether a field was deleted, and a top field first flag TFF declaring which of the two fields in the each of the resulting frames is first on the time-base,

comprising a memory means for storing plural video signal fields,

a selection means for selecting the output from the memory means,

a means for comparing fields of the same parity,

a means for detecting the repeated redundant fields from the output result of this comparison means,

a control means for controlling the selection means based on the redundant field detection result, and outputting an intermediate signal from which the redundant fields have been deleted,

a flag setting means for setting the above flags based on the redundant field detection result,

a means for holding the output of the control means and the flag setting means to a particular value, and prohibiting redundant field deletion, and

characterized by when plural logical recording periods are provided on a single recording medium, converting the video signal to the recording signal so that said flags hold particular values at the start and end of each recording period by prohibiting redundant field deletion at the start and end of each recording period.