VIDEO SIGNAL RECORDING AND REPRODUCING APPARATUS

• US 20070154174A1
• Filed: 03/14/2007
• Published: 07/05/2007
• Est. Priority Date: 09/11/1995
• Status: Active Grant

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: KATOU, Yoshikazu, SASAKI, Seishi
• Granted Patent: US 8,285,109 B2
• Time in Patent Office: Days
• US Class Current: 386/230
• CPC Class Codes: G11B 20/00007 Time or data compression or expansion audio compression based on psychoacoustics G10L19/00; data processing for reproducing audio data at different playback speeds G10L21/04; video compression H04N19/00; data compression per se H03M7/30
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 2020/10592 specifically adapted for recording or reproducing multichannel signals
• CPC Class Codes: G11B 2020/10916 Seeking data on the record carrier for preparing an access to a specific address
• CPC Class Codes: G11B 2020/10953 Concurrent recording or playback of different streams or files
• CPC Class Codes: G11B 2020/10962 wherein both recording and playback take place simultaneously
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: H04N 19/40 using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
• CPC Class Codes: H04N 19/423 characterised by memory arrangements H04N19/433 takes precedence
• CPC Class Codes: H04N 19/428 Recompression, e.g. by spatial or temporal decimation
• CPC Class Codes: H04N 19/587 involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
• CPC Class Codes: H04N 19/61 in combination with predictive coding
• CPC Class Codes: H04N 21/4147 PVR [Personal Video Recorder] H04N5/76 takes precedence ; arrangements for broadcast with accumulation-type receivers H04H20/40
• CPC Class Codes: H04N 21/42204 User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor constructive details of casings for the remote control device H01H9/0235; user interfaces for controlling a tuning device of a television receiver through a remote control H03J9/00; remote control of peripheral devices connected to a television receiver through the remote control device of the television receiver H04B1/205
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4316 for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/440281 by altering the temporal resolution, e.g. by frame skipping television signal recording using magnetic recording on tape for reproducing at a rate different from the recording rate H04N5/783
• CPC Class Codes: H04N 21/47 End-user applications
• CPC Class Codes: H04N 5/45 Picture in picture , e.g. displaying simultaneously another television channel in a region of the screen
• CPC Class Codes: H04N 5/76 : Television signal recording
• CPC Class Codes: H04N 5/775 : between a recording apparatus and a television receiver
• CPC Class Codes: H04N 5/781 : on disks or drums
• CPC Class Codes: H04N 5/782 : on tape
• CPC Class Codes: H04N 5/783 : Adaptations for reproducing at a rate different from the recording rate
• CPC Class Codes: H04N 5/85 : on discs or drums
• 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 9/8227 : the additional signal being at least another television signal

Abstract

The video signal recording and reproducing apparatus of the invention includes: a receiving section for receiving a television signal; an image compression section for compressing an amount of information per unit time of the received continuous video signal; a writing section for intermittently writing a compressed video signal, obtained as an output of the image compression section, onto a hard disk apparatus via a magnetic head; a reading section for intermittently reading out the written compressed video signal from the hard disk apparatus via the magnetic head; a decoding section for restoring the read compressed video signal into an original video signal; a display section for displaying the restored video signal; and a control section for controlling the writing section and the reading section such that writing the video signal onto the hard disk apparatus and reading an arbitrary video signal, which was previously written onto the hard disk apparatus, from the hard disk apparatus are performed apparently simultaneously and continuously.

Claims

1. A video signal recording and reproducing apparatus, comprising:

an input section operable to input a video signal;

a time-axis compression section operable to perform a time-axis compression operation on the video signal;

a writing section operable to write a time-axis compressed video signal on a hard disk via a magnetic head, the time-axis compressed video signal being obtained as an output of the time-axis compression means;

a reading section operable to read out the written time-axis compressed video signal from the hard disk via the magnetic head which is the same as said magnetic head;

a time-axis expansion section operable to decompress the read time-axis compressed video signal so as to obtain the original video signal; and

an output section operable to output the time-axis expanded video signal,

wherein

the input video signal is written on the hard disk and a previously recorded video signal is read out simultaneously,

the video signal recording and reproducing apparatus further comprising;

a recording section operable to record information pertaining to a time at which a video signal was recorded; and

a control section operable to make the recorded time of a reproduced video signal catch up with a current time by a high-rate reproduction.

2. A digital video recorder which simultaneously records and plays broadcast video program, comprising:

a tuner (2) and/or a demodulator (3) to receive a series of first video signals currently being broadcasted;

an encoder (4) to convert an analog form of the series of first video signals into a series of first compressed digital video signals which are digitally compressed form of the series of first video signals;

a recording section (5,6,7) operable to record the series of first compressed digital video signals onto a hard disk apparatus (8) by using a magnetic head;

a reading section (9,10,11) operable to read out a series of second compressed digital video signals recorded prior to the recording of the series of first compressed digital video signals by the same magnetic head;

a decoder (12) to reproduce a series of second video signals from the series of second compressed digital video signals and output the reproduced series of second video signals to a monitor (13),

a hard disk controller (14) to control a timing of operation of the recording section and the reading section in accordance with a transfer rate of the hard disk; and

a system controller (16) to output a display information representing a progress status of the reproduction of the series of second video signals to the monitor (13),

wherein said display information indicates a difference between the currently broadcast series of first video signals and the displayed series of second video signals.

3. A television (13), equipped with a digital video recorder which records and plays broadcast video program, said digital video recorder including:

a tuner (2) and/or a demodulator (3) to receive a series of first video signals currently being broadcasted;

an encoder (4) to convert an analog form of the series of first video signals into a series of first compressed digital video signals which are digitally compressed form of the series of first video signals;

a recording section (5,6,7) operable to record the series of first compressed digital video signals onto a hard disk apparatus (8) by using a magnetic head;

a reading section (9,10,11) operable to read out a series of second compressed digital video signals recorded prior to the recording of the series of first compressed digital video signals by the same magnetic head;

a decoder (12) to restore a series of second video signals from the series of second compressed digital video signals and output the reproduced series of second video signals to a monitor (13);

a hard disk controller (14) to control a timing of operation of the recording section and the reading section in accordance with a transfer rate of the hard disk; and

a system controller (16) to output a display information representing a progress status of the reproduction of the series of second video signals,

wherein said display information indicates a difference between the currently broadcast series of first video signals and the displayed series of second video signals; and

said television comprising;

a monitor (13) to display the reproduced series of second video signals, said difference, and a time difference of the delay of the reproduced series of second video signals with respect to a current time.

4. A television according to claim 3, wherein said system controller output said display information representing said progress status, when simultaneous recording and reproducing mode is on.