摘要:
A video signal recording and reproducing apparatus in accordance with the present invention includes A/D converters (1-3), a shuffling circuit (5) and magnetic heads (A1, A2, B1, B2). The A/D converters (1-3) A/D-convert a luminance signal Y and color difference signals P B and P R included in a video signal. The shuffling circuit (5) divides each A/D converted data into first and second channels and further divides the first and second channels into data of a first segment including the color difference signal P R and data of a second segment including the color difference signal P B . The data of the first segments of the first and second channels are recorded on a magnetic tape with a spacing of one track by the magnetic heads (A1 and A2), data of the second segment of the first channel is recorded by the magnetic head (B1) on a portion between the tracks where the first segments are recorded, and data of the second segment of the second channel is recorded on a portion adjacent to the track where the first segment of the second channel is recorded. In a hi-vision VTR, it is possible to prevent an image of improper or poor hues due to differences in characteristics between the channels and enhance a capability of dropout compensation.
摘要:
In a system including the first terminal and the second terminal. A communication method at the first terminal includes the steps of preparing its own device name, detecting (S150) a request for connection with the second terminal, rewriting (S152) the device name in response to the request, and transmitting (S162) the changed device name to the second terminal. A communication method at the second terminal includes the steps of receiving device names from a plurality of first terminals, displaying the device names for the user of the second terminal to recognize a changed device name easier than unchanged device names, and communicating with the first terminal specified by a device name selected by the user.
摘要:
A video signal recording apparatus is provided with the first and second channels for transmitting an input video signal. The first channel has a line memory for conducting a 1H delay on data and a timebase-extension use line memory for conducting time base extension on the data with the 1 H delay. The data subjected to the time base extension undergoes D/A conversion to make an output of the first channel. On the other hand, the second channel does not have a line memory for a 1 H delay, and the video signal without a delay is subjected to time base extension and undergoes D/A conversion to make an output of the second channel. In the arrangement, it is allowed to reverse an arrangement of odd lines and even lines respectively contained in adjoining two frames in each channel such that in a certain frame, odd lines of the input video signal are transmitted through the first channel with even lines through the second channel, and in the next frame, even lines are transmitted through the first channel with odd lines through the second channel. Thus, influences due to the difference of circuit characteristics is averaged on the reproduced picture, and it is avoided that the influence is perceived as unevenness of color or brightness.
摘要:
A video signal recording device is provided with a time base extension of N-times to an input video signal to form a record signal and recording the signal on a recording medium by dividing it into a plurality of channels the number of which is given by N or integral multiples of N. The recording device includes a line memory control circuit for shifting a phase of a signal of each channel by 1/N horizontal scanning period. The video signal reproduction device makes a sync separated signal of each channel coincide with a horizontal synchronizing signal of the input video signal. More specifically, the reproduction device includes an OR circuit which conducts logical "Add" of the sync separated signals of the respective signals. Thereby the Sync separated signal obtained by the logical "Add" coincides with the horizontal Synchronizing signal of the input video signal.
摘要:
A video signal recording apparatus is provided with the first and second channels for transmitting an input video signal. The first channel has a line memory for conducting a 1H delay on data and a timebase-extension use line memory for conducting time base extension on the data with the 1 H delay. The data subjected to the time base extension undergoes D/A conversion to make an output of the first channel. On the other hand, the second channel does not have a line memory for a 1 H delay, and the video signal without a delay is subjected to time base extension and undergoes D/A conversion to make an output of the second channel. In the arrangement, it is allowed to reverse an arrangement of odd lines and even lines respectively contained in adjoining two frames in each channel such that in a certain frame, odd lines of the input video signal are transmitted through the first channel with even lines through the second channel, and in the next frame, even lines are transmitted through the first channel with odd lines through the second channel. Thus, influences due to the difference of circuit characteristics is averaged on the reproduced picture, and it is avoided that the influence is perceived as unevenness of color or brightness.
摘要:
A video signal recording device is provided with a time base extension of N-times to an input video signal to form a record signal and recording the signal on a recording medium by dividing it into a plurality of channels the number of which is given by N or integral multiples of N. The recording device includes a line memory control circuit for shifting a phase of a signal of each channel by 1/N horizontal scanning period. The video signal reproduction device makes a sync separated signal of each channel coincide with a horizontal synchronizing signal of the input video signal. More specifically, the reproduction device includes an OR circuit which conducts logical "Add" of the sync separated signals of the respective signals. Thereby the Sync separated signal obtained by the logical "Add" coincides with the horizontal Synchronizing signal of the input video signal.
摘要:
A video signal recording and reproducing apparatus in accordance with the present invention includes A/D converters (1-3), a shuffling circuit (5) and magnetic heads (A1, A2, B1, B2). The A/D converters (1-3) A/D-convert a luminance signal Y and color difference signals P B and P R included in a video signal. The shuffling circuit (5) divides each A/D converted data into first and second channels and further divides the first and second channels into data of a first segment including the color difference signal P R and data of a second segment including the color difference signal P B . The data of the first segments of the first and second channels are recorded on a magnetic tape with a spacing of one track by the magnetic heads (A1 and A2), data of the second segment of the first channel is recorded by the magnetic head (B1) on a portion between the tracks where the first segments are recorded, and data of the second segment of the second channel is recorded on a portion adjacent to the track where the first segment of the second channel is recorded. In a hi-vision VTR, it is possible to prevent an image of improper or poor hues due to differences in characteristics between the channels and enhance a capability of dropout compensation.